disabled adding students from courses
changed request queue initialization, hopefully fixes #2
added option to set and check wether the app was started before
Different course list icon for study groups
Crashlytics custom crash report messages
fixed course color parsing error, course list icon background reflects now the course color
loading the print version of legal notice and privacy policy
Disabled the sorry smiley :(
FIxed never disappearing progressbar
Long subject don't destroy the layout anymore
Fitted look and feel
Server class refactoring
SyncHelper refactoring phase one
JSON server parsing, new SyncHelper callback usage
feedback email change
Reset SyncHelper on logout, fix strange out of index error
refreshed SyncHelper calls, formatting BS
SyncHelper call refreshed
Server class call refreshed, fixed possible Fragment not added error
formatting, Server class calls refreshed