minor changes #156
minor changes image assets
added brick edit menu #127 (in progress)
Merge branch 'ide' of gh:Catrobat/Catty into ide_ralph

* 'ide' of gh:Catrobat/Catty:
  added brick edit menu #127 (in progress)
  minor changes image assets
  minor changes #156
todos + clean up assets catalogue
remove useless DBGradientBorderedImageCell
DBGradientBorderedImageCell for #133
edit menu for MyProgramsTVC
switch between Show/Hide Details
fix error due to wrong compile sources
segue fix for DBGradientBorderedImageCell
save show/hide selection in NSUserDefaults
grid Labels for details
program size + last access date + datacache
fix for broken tests
date extensions + human friendly formatted date
add detail cells to missing TVCs
show/hide details button in ProgramTVC
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removed test commit