refactoring
base script cell view, added image assets catalog
updated brick titles + reformat define-consts
Merge branch 'ide' of gh:Catrobat/Catty into development

* 'ide' of gh:Catrobat/Catty:
  base script cell view, added image assets catalog
  refactoring
colored category brick views
convert UITableVC to UICollectionVC
Merge branch 'development' of gh:Catrobat/Catty into ide

* 'development' of gh:Catrobat/Catty:
  improvements loudness handler
  fixes touch issue
  fixes #53
  some test changes
restructured hierarchy of IDE classes
fix for last commit
determine and convert brick cell properly
add brick-pattern icons
update UIDefine- and ProgramDefine-consts
dynamically generate BrickCells
add background patterns to bricks
add all brick graphics + background graphics
map image names to bricks
brick enumeration: out of bounds check
simplified BrickCell generation code
outsourced remaining consts
bug fix when changing brick category