Added username validator
fixed select background color #111
Optimized regexp checking #259
(and fixed error in email REGEXP_EMAIL_ID)
Added filtering by participants for #111
(currently by id only)
Added filter by creator #111
Removed flag icons by displaying raw value #133
Added support for scrolling in selects with too many items, especially for #111
prepared match select #111 for updating the 3D-view #112 on select
Added loadList to EntityManager #261
fixed potential nullpointer in PlayerRole.toString() #262
searching error on mapping player #262
added stacktraceoutput for #262
added support for preloading entities #261
fixed property loading for empty lists (callback was not called) #261