Extract a bunch of commonly used python stuff into AmaroLib.py.

Also some pylint cleanups, a @3x version of the app icon, and made the various
build phase scripts be a little more verbose about what they're doing.
Storyboard id codegen now makes namespaced constants
Version bump
Add asset catalog codegen
Bug fix for projects without class prefixes
Merge pull request #15 from crushlovely/assetcatalog-codegen

DRY'd up some scripts, asset catalog codegen, namespaced storyboard codegen