Add handy Handlebars helper to repeat a block N times

Usage: {{#times 4}}hello{{/times}
Can also use any variables in context, e.g. {{#times things.length}}

src/output-website/template.js

@@ -51,6 +51,15 @@ exports.create = function(options) {
     return ret;
   });
 
+  // utility helper
+  // execute the child block N times
+  handlebars.registerHelper('times', function(n, block) {
+      var accum = '';
+      for(var i = 0; i < n; ++i)
+          accum += block.fn(i);
+      return accum;
+  });
+
   // utility helper
   // render the correct download path based on user options
   handlebars.registerHelper('download', function(file) {