Mobishit v1.3

Added messages sending feature
Completely refactored MainActivity class
Added links support in messages
Fixed ignoring opening mark/message bug
Fixed "double fragment" bug (when open a detail fragment then hide app and open main fragment (for example by clicking widget) two fragments with transparent background were visible)
Made attendance notifications open specified day instead of nothing or just a timetable
Migrated dedicated server API to Python
Improved handling uncaught exceptions (instead of notification there is an activity launched)
Improved average calculation method (no count to average flag)
Fixed displaying mark with parent mark when title is 2 lines
Added information about counting attendances
Fixed "December" crash in attendance stats
Refactored MessageDetailsFragment and added reply button
Widget lessons list is cached in static variable and also it's now serialized and saved on disk
Got rid of showing weight next to "unreadiness" mark
Used shared icons in ComparsionsFragment
Deleted option "refresh at weekends" - now it's always true
Deleted developer options
Added last marks list on SubjectsList which are cached in database
Added "excluding subjects in attendance stats" option
There is the subject object with id = 0 named "Other events", so subject is never null anymore
Migrated to Compat Vector Drawables and added png icons instead of xml (vector) or drawables posted in notification

And more