Removed OnClick on the mTaskSetDateButton in EditTaskActivity
Fixed back button
Merge branch 'master' of ssh://94.124.143.135:7999/test/sufficient
Fixed duplicated lists.
Merge branch 'master' of ssh://94.124.143.135:7999/test/sufficient
Fixed duplicated lists. /2
Merge branch 'master' of ssh://94.124.143.135:7999/test/sufficient
Fixed edit category
Fixed application crashing when adding task without existing category
Merge branch 'master' of ssh://94.124.143.135:7999/test/sufficient

Conflicts:
	src/main/java/nl/enterprisecoding/android/sufficient/activities/EditTaskActivity.java
	src/main/java/nl/enterprisecoding/android/sufficient/controllers/TaskManager.java
Merge branch 'master' of ssh://94.124.143.135:7999/test/sufficient
Fixed transition to category view upon error from adding task
Merge branch 'master' of ssh://94.124.143.135:7999/test/sufficient
Fixed sonar issues.
Merge branch 'master' of ssh://94.124.143.135:7999/test/sufficient
Added missing JavaDoc. Optimized codebase.
Fixed Sonar issues. Added missing JavaDoc.