diff --git a/lib/colorbrewer.js b/lib/colorbrewer.js
new file mode 100644
index 0000000..2295527
--- /dev/null
+++ b/lib/colorbrewer.js
@@ -0,0 +1,302 @@
+// This product includes color specifications and designs developed by Cynthia Brewer (http://colorbrewer.org/).
+var colorbrewer = {YlGn: {
+3: ["#f7fcb9","#addd8e","#31a354"],
+4: ["#ffffcc","#c2e699","#78c679","#238443"],
+5: ["#ffffcc","#c2e699","#78c679","#31a354","#006837"],
+6: ["#ffffcc","#d9f0a3","#addd8e","#78c679","#31a354","#006837"],
+7: ["#ffffcc","#d9f0a3","#addd8e","#78c679","#41ab5d","#238443","#005a32"],
+8: ["#ffffe5","#f7fcb9","#d9f0a3","#addd8e","#78c679","#41ab5d","#238443","#005a32"],
+9: ["#ffffe5","#f7fcb9","#d9f0a3","#addd8e","#78c679","#41ab5d","#238443","#006837","#004529"]
+},YlGnBu: {
+3: ["#edf8b1","#7fcdbb","#2c7fb8"],
+4: ["#ffffcc","#a1dab4","#41b6c4","#225ea8"],
+5: ["#ffffcc","#a1dab4","#41b6c4","#2c7fb8","#253494"],
+6: ["#ffffcc","#c7e9b4","#7fcdbb","#41b6c4","#2c7fb8","#253494"],
+7: ["#ffffcc","#c7e9b4","#7fcdbb","#41b6c4","#1d91c0","#225ea8","#0c2c84"],
+8: ["#ffffd9","#edf8b1","#c7e9b4","#7fcdbb","#41b6c4","#1d91c0","#225ea8","#0c2c84"],
+9: ["#ffffd9","#edf8b1","#c7e9b4","#7fcdbb","#41b6c4","#1d91c0","#225ea8","#253494","#081d58"]
+},GnBu: {
+3: ["#e0f3db","#a8ddb5","#43a2ca"],
+4: ["#f0f9e8","#bae4bc","#7bccc4","#2b8cbe"],
+5: ["#f0f9e8","#bae4bc","#7bccc4","#43a2ca","#0868ac"],
+6: ["#f0f9e8","#ccebc5","#a8ddb5","#7bccc4","#43a2ca","#0868ac"],
+7: ["#f0f9e8","#ccebc5","#a8ddb5","#7bccc4","#4eb3d3","#2b8cbe","#08589e"],
+8: ["#f7fcf0","#e0f3db","#ccebc5","#a8ddb5","#7bccc4","#4eb3d3","#2b8cbe","#08589e"],
+9: ["#f7fcf0","#e0f3db","#ccebc5","#a8ddb5","#7bccc4","#4eb3d3","#2b8cbe","#0868ac","#084081"]
+},BuGn: {
+3: ["#e5f5f9","#99d8c9","#2ca25f"],
+4: ["#edf8fb","#b2e2e2","#66c2a4","#238b45"],
+5: ["#edf8fb","#b2e2e2","#66c2a4","#2ca25f","#006d2c"],
+6: ["#edf8fb","#ccece6","#99d8c9","#66c2a4","#2ca25f","#006d2c"],
+7: ["#edf8fb","#ccece6","#99d8c9","#66c2a4","#41ae76","#238b45","#005824"],
+8: ["#f7fcfd","#e5f5f9","#ccece6","#99d8c9","#66c2a4","#41ae76","#238b45","#005824"],
+9: ["#f7fcfd","#e5f5f9","#ccece6","#99d8c9","#66c2a4","#41ae76","#238b45","#006d2c","#00441b"]
+},PuBuGn: {
+3: ["#ece2f0","#a6bddb","#1c9099"],
+4: ["#f6eff7","#bdc9e1","#67a9cf","#02818a"],
+5: ["#f6eff7","#bdc9e1","#67a9cf","#1c9099","#016c59"],
+6: ["#f6eff7","#d0d1e6","#a6bddb","#67a9cf","#1c9099","#016c59"],
+7: ["#f6eff7","#d0d1e6","#a6bddb","#67a9cf","#3690c0","#02818a","#016450"],
+8: ["#fff7fb","#ece2f0","#d0d1e6","#a6bddb","#67a9cf","#3690c0","#02818a","#016450"],
+9: ["#fff7fb","#ece2f0","#d0d1e6","#a6bddb","#67a9cf","#3690c0","#02818a","#016c59","#014636"]
+},PuBu: {
+3: ["#ece7f2","#a6bddb","#2b8cbe"],
+4: ["#f1eef6","#bdc9e1","#74a9cf","#0570b0"],
+5: ["#f1eef6","#bdc9e1","#74a9cf","#2b8cbe","#045a8d"],
+6: ["#f1eef6","#d0d1e6","#a6bddb","#74a9cf","#2b8cbe","#045a8d"],
+7: ["#f1eef6","#d0d1e6","#a6bddb","#74a9cf","#3690c0","#0570b0","#034e7b"],
+8: ["#fff7fb","#ece7f2","#d0d1e6","#a6bddb","#74a9cf","#3690c0","#0570b0","#034e7b"],
+9: ["#fff7fb","#ece7f2","#d0d1e6","#a6bddb","#74a9cf","#3690c0","#0570b0","#045a8d","#023858"]
+},BuPu: {
+3: ["#e0ecf4","#9ebcda","#8856a7"],
+4: ["#edf8fb","#b3cde3","#8c96c6","#88419d"],
+5: ["#edf8fb","#b3cde3","#8c96c6","#8856a7","#810f7c"],
+6: ["#edf8fb","#bfd3e6","#9ebcda","#8c96c6","#8856a7","#810f7c"],
+7: ["#edf8fb","#bfd3e6","#9ebcda","#8c96c6","#8c6bb1","#88419d","#6e016b"],
+8: ["#f7fcfd","#e0ecf4","#bfd3e6","#9ebcda","#8c96c6","#8c6bb1","#88419d","#6e016b"],
+9: ["#f7fcfd","#e0ecf4","#bfd3e6","#9ebcda","#8c96c6","#8c6bb1","#88419d","#810f7c","#4d004b"]
+},RdPu: {
+3: ["#fde0dd","#fa9fb5","#c51b8a"],
+4: ["#feebe2","#fbb4b9","#f768a1","#ae017e"],
+5: ["#feebe2","#fbb4b9","#f768a1","#c51b8a","#7a0177"],
+6: ["#feebe2","#fcc5c0","#fa9fb5","#f768a1","#c51b8a","#7a0177"],
+7: ["#feebe2","#fcc5c0","#fa9fb5","#f768a1","#dd3497","#ae017e","#7a0177"],
+8: ["#fff7f3","#fde0dd","#fcc5c0","#fa9fb5","#f768a1","#dd3497","#ae017e","#7a0177"],
+9: ["#fff7f3","#fde0dd","#fcc5c0","#fa9fb5","#f768a1","#dd3497","#ae017e","#7a0177","#49006a"]
+},PuRd: {
+3: ["#e7e1ef","#c994c7","#dd1c77"],
+4: ["#f1eef6","#d7b5d8","#df65b0","#ce1256"],
+5: ["#f1eef6","#d7b5d8","#df65b0","#dd1c77","#980043"],
+6: ["#f1eef6","#d4b9da","#c994c7","#df65b0","#dd1c77","#980043"],
+7: ["#f1eef6","#d4b9da","#c994c7","#df65b0","#e7298a","#ce1256","#91003f"],
+8: ["#f7f4f9","#e7e1ef","#d4b9da","#c994c7","#df65b0","#e7298a","#ce1256","#91003f"],
+9: ["#f7f4f9","#e7e1ef","#d4b9da","#c994c7","#df65b0","#e7298a","#ce1256","#980043","#67001f"]
+},OrRd: {
+3: ["#fee8c8","#fdbb84","#e34a33"],
+4: ["#fef0d9","#fdcc8a","#fc8d59","#d7301f"],
+5: ["#fef0d9","#fdcc8a","#fc8d59","#e34a33","#b30000"],
+6: ["#fef0d9","#fdd49e","#fdbb84","#fc8d59","#e34a33","#b30000"],
+7: ["#fef0d9","#fdd49e","#fdbb84","#fc8d59","#ef6548","#d7301f","#990000"],
+8: ["#fff7ec","#fee8c8","#fdd49e","#fdbb84","#fc8d59","#ef6548","#d7301f","#990000"],
+9: ["#fff7ec","#fee8c8","#fdd49e","#fdbb84","#fc8d59","#ef6548","#d7301f","#b30000","#7f0000"]
+},YlOrRd: {
+3: ["#ffeda0","#feb24c","#f03b20"],
+4: ["#ffffb2","#fecc5c","#fd8d3c","#e31a1c"],
+5: ["#ffffb2","#fecc5c","#fd8d3c","#f03b20","#bd0026"],
+6: ["#ffffb2","#fed976","#feb24c","#fd8d3c","#f03b20","#bd0026"],
+7: ["#ffffb2","#fed976","#feb24c","#fd8d3c","#fc4e2a","#e31a1c","#b10026"],
+8: ["#ffffcc","#ffeda0","#fed976","#feb24c","#fd8d3c","#fc4e2a","#e31a1c","#b10026"],
+9: ["#ffffcc","#ffeda0","#fed976","#feb24c","#fd8d3c","#fc4e2a","#e31a1c","#bd0026","#800026"]
+},YlOrBr: {
+3: ["#fff7bc","#fec44f","#d95f0e"],
+4: ["#ffffd4","#fed98e","#fe9929","#cc4c02"],
+5: ["#ffffd4","#fed98e","#fe9929","#d95f0e","#993404"],
+6: ["#ffffd4","#fee391","#fec44f","#fe9929","#d95f0e","#993404"],
+7: ["#ffffd4","#fee391","#fec44f","#fe9929","#ec7014","#cc4c02","#8c2d04"],
+8: ["#ffffe5","#fff7bc","#fee391","#fec44f","#fe9929","#ec7014","#cc4c02","#8c2d04"],
+9: ["#ffffe5","#fff7bc","#fee391","#fec44f","#fe9929","#ec7014","#cc4c02","#993404","#662506"]
+},Purples: {
+3: ["#efedf5","#bcbddc","#756bb1"],
+4: ["#f2f0f7","#cbc9e2","#9e9ac8","#6a51a3"],
+5: ["#f2f0f7","#cbc9e2","#9e9ac8","#756bb1","#54278f"],
+6: ["#f2f0f7","#dadaeb","#bcbddc","#9e9ac8","#756bb1","#54278f"],
+7: ["#f2f0f7","#dadaeb","#bcbddc","#9e9ac8","#807dba","#6a51a3","#4a1486"],
+8: ["#fcfbfd","#efedf5","#dadaeb","#bcbddc","#9e9ac8","#807dba","#6a51a3","#4a1486"],
+9: ["#fcfbfd","#efedf5","#dadaeb","#bcbddc","#9e9ac8","#807dba","#6a51a3","#54278f","#3f007d"]
+},Blues: {
+3: ["#deebf7","#9ecae1","#3182bd"],
+4: ["#eff3ff","#bdd7e7","#6baed6","#2171b5"],
+5: ["#eff3ff","#bdd7e7","#6baed6","#3182bd","#08519c"],
+6: ["#eff3ff","#c6dbef","#9ecae1","#6baed6","#3182bd","#08519c"],
+7: ["#eff3ff","#c6dbef","#9ecae1","#6baed6","#4292c6","#2171b5","#084594"],
+8: ["#f7fbff","#deebf7","#c6dbef","#9ecae1","#6baed6","#4292c6","#2171b5","#084594"],
+9: ["#f7fbff","#deebf7","#c6dbef","#9ecae1","#6baed6","#4292c6","#2171b5","#08519c","#08306b"]
+},Greens: {
+3: ["#e5f5e0","#a1d99b","#31a354"],
+4: ["#edf8e9","#bae4b3","#74c476","#238b45"],
+5: ["#edf8e9","#bae4b3","#74c476","#31a354","#006d2c"],
+6: ["#edf8e9","#c7e9c0","#a1d99b","#74c476","#31a354","#006d2c"],
+7: ["#edf8e9","#c7e9c0","#a1d99b","#74c476","#41ab5d","#238b45","#005a32"],
+8: ["#f7fcf5","#e5f5e0","#c7e9c0","#a1d99b","#74c476","#41ab5d","#238b45","#005a32"],
+9: ["#f7fcf5","#e5f5e0","#c7e9c0","#a1d99b","#74c476","#41ab5d","#238b45","#006d2c","#00441b"]
+},Oranges: {
+3: ["#fee6ce","#fdae6b","#e6550d"],
+4: ["#feedde","#fdbe85","#fd8d3c","#d94701"],
+5: ["#feedde","#fdbe85","#fd8d3c","#e6550d","#a63603"],
+6: ["#feedde","#fdd0a2","#fdae6b","#fd8d3c","#e6550d","#a63603"],
+7: ["#feedde","#fdd0a2","#fdae6b","#fd8d3c","#f16913","#d94801","#8c2d04"],
+8: ["#fff5eb","#fee6ce","#fdd0a2","#fdae6b","#fd8d3c","#f16913","#d94801","#8c2d04"],
+9: ["#fff5eb","#fee6ce","#fdd0a2","#fdae6b","#fd8d3c","#f16913","#d94801","#a63603","#7f2704"]
+},Reds: {
+3: ["#fee0d2","#fc9272","#de2d26"],
+4: ["#fee5d9","#fcae91","#fb6a4a","#cb181d"],
+5: ["#fee5d9","#fcae91","#fb6a4a","#de2d26","#a50f15"],
+6: ["#fee5d9","#fcbba1","#fc9272","#fb6a4a","#de2d26","#a50f15"],
+7: ["#fee5d9","#fcbba1","#fc9272","#fb6a4a","#ef3b2c","#cb181d","#99000d"],
+8: ["#fff5f0","#fee0d2","#fcbba1","#fc9272","#fb6a4a","#ef3b2c","#cb181d","#99000d"],
+9: ["#fff5f0","#fee0d2","#fcbba1","#fc9272","#fb6a4a","#ef3b2c","#cb181d","#a50f15","#67000d"]
+},Greys: {
+3: ["#f0f0f0","#bdbdbd","#636363"],
+4: ["#f7f7f7","#cccccc","#969696","#525252"],
+5: ["#f7f7f7","#cccccc","#969696","#636363","#252525"],
+6: ["#f7f7f7","#d9d9d9","#bdbdbd","#969696","#636363","#252525"],
+7: ["#f7f7f7","#d9d9d9","#bdbdbd","#969696","#737373","#525252","#252525"],
+8: ["#ffffff","#f0f0f0","#d9d9d9","#bdbdbd","#969696","#737373","#525252","#252525"],
+9: ["#ffffff","#f0f0f0","#d9d9d9","#bdbdbd","#969696","#737373","#525252","#252525","#000000"]
+},PuOr: {
+3: ["#f1a340","#f7f7f7","#998ec3"],
+4: ["#e66101","#fdb863","#b2abd2","#5e3c99"],
+5: ["#e66101","#fdb863","#f7f7f7","#b2abd2","#5e3c99"],
+6: ["#b35806","#f1a340","#fee0b6","#d8daeb","#998ec3","#542788"],
+7: ["#b35806","#f1a340","#fee0b6","#f7f7f7","#d8daeb","#998ec3","#542788"],
+8: ["#b35806","#e08214","#fdb863","#fee0b6","#d8daeb","#b2abd2","#8073ac","#542788"],
+9: ["#b35806","#e08214","#fdb863","#fee0b6","#f7f7f7","#d8daeb","#b2abd2","#8073ac","#542788"],
+10: ["#7f3b08","#b35806","#e08214","#fdb863","#fee0b6","#d8daeb","#b2abd2","#8073ac","#542788","#2d004b"],
+11: ["#7f3b08","#b35806","#e08214","#fdb863","#fee0b6","#f7f7f7","#d8daeb","#b2abd2","#8073ac","#542788","#2d004b"]
+},BrBG: {
+3: ["#d8b365","#f5f5f5","#5ab4ac"],
+4: ["#a6611a","#dfc27d","#80cdc1","#018571"],
+5: ["#a6611a","#dfc27d","#f5f5f5","#80cdc1","#018571"],
+6: ["#8c510a","#d8b365","#f6e8c3","#c7eae5","#5ab4ac","#01665e"],
+7: ["#8c510a","#d8b365","#f6e8c3","#f5f5f5","#c7eae5","#5ab4ac","#01665e"],
+8: ["#8c510a","#bf812d","#dfc27d","#f6e8c3","#c7eae5","#80cdc1","#35978f","#01665e"],
+9: ["#8c510a","#bf812d","#dfc27d","#f6e8c3","#f5f5f5","#c7eae5","#80cdc1","#35978f","#01665e"],
+10: ["#543005","#8c510a","#bf812d","#dfc27d","#f6e8c3","#c7eae5","#80cdc1","#35978f","#01665e","#003c30"],
+11: ["#543005","#8c510a","#bf812d","#dfc27d","#f6e8c3","#f5f5f5","#c7eae5","#80cdc1","#35978f","#01665e","#003c30"]
+},PRGn: {
+3: ["#af8dc3","#f7f7f7","#7fbf7b"],
+4: ["#7b3294","#c2a5cf","#a6dba0","#008837"],
+5: ["#7b3294","#c2a5cf","#f7f7f7","#a6dba0","#008837"],
+6: ["#762a83","#af8dc3","#e7d4e8","#d9f0d3","#7fbf7b","#1b7837"],
+7: ["#762a83","#af8dc3","#e7d4e8","#f7f7f7","#d9f0d3","#7fbf7b","#1b7837"],
+8: ["#762a83","#9970ab","#c2a5cf","#e7d4e8","#d9f0d3","#a6dba0","#5aae61","#1b7837"],
+9: ["#762a83","#9970ab","#c2a5cf","#e7d4e8","#f7f7f7","#d9f0d3","#a6dba0","#5aae61","#1b7837"],
+10: ["#40004b","#762a83","#9970ab","#c2a5cf","#e7d4e8","#d9f0d3","#a6dba0","#5aae61","#1b7837","#00441b"],
+11: ["#40004b","#762a83","#9970ab","#c2a5cf","#e7d4e8","#f7f7f7","#d9f0d3","#a6dba0","#5aae61","#1b7837","#00441b"]
+},PiYG: {
+3: ["#e9a3c9","#f7f7f7","#a1d76a"],
+4: ["#d01c8b","#f1b6da","#b8e186","#4dac26"],
+5: ["#d01c8b","#f1b6da","#f7f7f7","#b8e186","#4dac26"],
+6: ["#c51b7d","#e9a3c9","#fde0ef","#e6f5d0","#a1d76a","#4d9221"],
+7: ["#c51b7d","#e9a3c9","#fde0ef","#f7f7f7","#e6f5d0","#a1d76a","#4d9221"],
+8: ["#c51b7d","#de77ae","#f1b6da","#fde0ef","#e6f5d0","#b8e186","#7fbc41","#4d9221"],
+9: ["#c51b7d","#de77ae","#f1b6da","#fde0ef","#f7f7f7","#e6f5d0","#b8e186","#7fbc41","#4d9221"],
+10: ["#8e0152","#c51b7d","#de77ae","#f1b6da","#fde0ef","#e6f5d0","#b8e186","#7fbc41","#4d9221","#276419"],
+11: ["#8e0152","#c51b7d","#de77ae","#f1b6da","#fde0ef","#f7f7f7","#e6f5d0","#b8e186","#7fbc41","#4d9221","#276419"]
+},RdBu: {
+3: ["#ef8a62","#f7f7f7","#67a9cf"],
+4: ["#ca0020","#f4a582","#92c5de","#0571b0"],
+5: ["#ca0020","#f4a582","#f7f7f7","#92c5de","#0571b0"],
+6: ["#b2182b","#ef8a62","#fddbc7","#d1e5f0","#67a9cf","#2166ac"],
+7: ["#b2182b","#ef8a62","#fddbc7","#f7f7f7","#d1e5f0","#67a9cf","#2166ac"],
+8: ["#b2182b","#d6604d","#f4a582","#fddbc7","#d1e5f0","#92c5de","#4393c3","#2166ac"],
+9: ["#b2182b","#d6604d","#f4a582","#fddbc7","#f7f7f7","#d1e5f0","#92c5de","#4393c3","#2166ac"],
+10: ["#67001f","#b2182b","#d6604d","#f4a582","#fddbc7","#d1e5f0","#92c5de","#4393c3","#2166ac","#053061"],
+11: ["#67001f","#b2182b","#d6604d","#f4a582","#fddbc7","#f7f7f7","#d1e5f0","#92c5de","#4393c3","#2166ac","#053061"]
+},RdGy: {
+3: ["#ef8a62","#ffffff","#999999"],
+4: ["#ca0020","#f4a582","#bababa","#404040"],
+5: ["#ca0020","#f4a582","#ffffff","#bababa","#404040"],
+6: ["#b2182b","#ef8a62","#fddbc7","#e0e0e0","#999999","#4d4d4d"],
+7: ["#b2182b","#ef8a62","#fddbc7","#ffffff","#e0e0e0","#999999","#4d4d4d"],
+8: ["#b2182b","#d6604d","#f4a582","#fddbc7","#e0e0e0","#bababa","#878787","#4d4d4d"],
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