Updated readme

README.md

@@ -3,3 +3,14 @@
 ## Fast
 
 It currently parses 632383 emails in ~160 seconds, so roughly `4.000` emails per second. This excludes (for now) attachments.
+
+## Open Issues
+- [ ] make the rectangles look nicer
+- [ ] improve the egui UI
+- [ ] generate deletion rules based on stack?
+- [ ] try the segment range slider with two sides
+- [ ] support mbox
+- [ ] support apple mail
+- [ ] try `iced` or `druid` as well
+- [ ] maybe add blocking versions of the calls, too (in model)
+- [ ] abstract over `Fields` and backend