changes brick adding to script
insert new brick into visible section
add new brick to last visible script
fixed glitch cell update
fixes add brick last script
minor changes adding bricks
fix 64bit crash edit mode
new placeholder view background and looks VC (in progress)
Merge branch 'feature/new_brick_add' into ide

Conflicts:
	src/Catty/BaseTableViewController.m
refactoring and fixes placeholder view
minor change base tvc
Merge branch 'ide' of github.com:Catrobat/Catty into feature/cell_refactor

Conflicts:
	src/Catty/BaseTableViewController.m
	src/Catty/ProgramTableViewController.m
	src/Catty/iPhone.storyboard