fix possible nullpointerexception
Merge pull request #436 from Catrobat/fixUtilFilePossibleNullPointer

fix possible NullPointerException in UtliFile
inserted new bigger icons
removed xxhdpi icon
Refactoring and Testing
Merge remote-tracking branch 'origin/master' into tutorial_hints
Fix displaying of details

Last access now shows "Today <time>" or "Yesterday" or the date
accordingly
Fixed TransparentWhenBrickTest
Merge pull request #439 from Catrobat/refactorTests

Fixed TransparentWhenBrickTest
Add test for displaying of details
Merge branch 'master' into ShowDetails
Refactor MyProjectsActivityTest#testImageCache
Fixed testImageCache
LAST FIX BEFORE BETA :) zip zip
Merge branch 'master' into refactorTests
Merge pull request #440 from Catrobat/refactorTests

Fixed testImageCache
changed text clicking order
Merge pull request #438 from Catrobat/redesign

Redesign
Merge pull request #441 from Catrobat/FixTestStrings

Fixed FormulaEditorEditTextTest testStrings
Refactor NextLookAction and fix Look doTouchDown.