fix compile warning
Merge branch 'development' of gh:Catrobat/Catty into development

* 'development' of gh:Catrobat/Catty:
  remove image borders
  fixes #72 and #136
Merge branch 'development_andi' of gh:Catrobat/Catty into development

* 'development_andi' of gh:Catrobat/Catty:
  test for authentication
  test for authentication
  test commit for 2factor authentication
ui fix for searchStoreDownloadViewController
fix small bug in ProgramTVCNewProgamTests
Merge branch 'development' of gh:Catrobat/Catty into development

* 'development' of gh:Catrobat/Catty:
  ui fix for searchStoreDownloadViewController
fix failed tests (reason: programs root dir missing)
Merge branch 'master' of github.com:Catrobat/Catty