Improvements

Add author_type and is_speaker fields for persons in the JSON abstract export
Add legacy redirect for conferenceTimeTable.py

Bugfixes

Fix unicode error when searching external users from the "Search Users" dialog
Fix missing event management menu/layout when creating a material package from the event management area
Fix error when viewing a contribution with co-authors
Fix sorting of registration form items not working anymore after moving/disabling some items
Fix error after updating from 2.0rc1 if there are cached Mako templates
Fix error when retrieving an image referenced in an abstract fails
Fix rendering of time pickers in recent Firefox versions (#3194)
Fix error when trying to use the html serializer with the timetable API
Fix error when receiving invalid payment events that should be ignored
Fix last occurrence not being created when cloning events (#3192)
Fix multiple links in the same line being replaced with the first one when converting abstracts/contributions to PDF (#2816)
Fix PDF generation when there are links with & in the URL
Fix incorrect spacing in abstract author/speaker lists (#3205)