Got started with teachers widget
Merge remote-tracking branch 'regalis/dev' into dev
Fix some things and slots table view
Added Teachers files to .pro file
Groups.cpp and Groups.hpp almost ready, added Groups to .pro file
Merge branch 'dev' of git://github.com/Regalis/Lesson-Plan-Scheduler into dev

Conflicts:
	src/lesson-plan-scheduler.pro
Add Teachers and Groups to MainMenu