Merge pull request #149 from Catrobat/development

Development
added cancel button in ProgramDetailStoreView
fix small issue
fix wrong status bar color for modal VCs
fixes #150
added support for progressView
ProgressView at ProgramDetailStoreViewController
small bugfix
merge
solved merge Conflicts
better integration of progressView
Merge pull request #151 from Catrobat/development

Development
fixed testcase warning
status bar reenabled once back from scene
Merge branch 'master' of github.com:Catrobat/Catty
moved status bar hidden to viewWillDisappear
fix resetting last program on restart
changed network defines
fix for not reloading when we received all data
display featured image in downloads