* actionModeMain.xml:
* ic_action_new.png:
* ic_action_new.png:
* ic_action_new.png:
* ic_action_edit.png:
* ic_action_edit.png:
* ic_action_new.png:
* ic_action_edit.png:
* ic_action_edit.png:
* ic_action_search.png:
* ic_action_search.png:
* ic_action_search.png:
* ic_action_search.png:
* ic_action_discard.png:
* ic_action_discard.png:
* ic_action_discard.png:
* ic_action_discard.png: Added icons and xml for context action bar

* QuestionGroups.cs:
* QuestionGroupsDatabase.cs: Added and populated a has_questions field

* MainActivity.cs:
* GroupListAdapter.cs: Changed from context menu to context action
  menu

* AnswerScreen.cs:
* QuestionsNewAndroid.csproj:
* ViewAnswersScreen.cs:
* QuestionGroupScreen.cs:
* Resource.designer.cs:
* ViewSpecificAnswerScreen.cs: Removed the modify title code that was
  not working anyways

* GroupView.axml: Removed the overflow button