Gameplay GUI.

Card view controller initializes with card, hadles answer choose and shows answer. GameVC manages initializing and different card views switching. Animation also works. Back button doesn't work, but it will be implemented soon.
Merge branch 'djachenko'

* djachenko:
  Gameplay GUI.

Conflicts:
	src/Erundopel/Erundopel.xcodeproj/project.pbxproj
	src/Erundopel/Erundopel/MainMenuVC.m