Improve date picker, to take into account current date range
Filters trigger an event when they are changed
delete session if log you in
Allow parser to read from any file, and make recreate script read from this.

Make addEvent/Person check for existing things before they get added to prevent duplicates
Add roles to event participants

Also rename attendees to participants everywhere
ellipsise overly long infowindow headers
move underscore_string to libs so the tests pass