move these files around
changes to the requirements to allow platform-dependent loading
Break core/app into platform files

+ add App.osx?
fix how colors are chosen depending on platform
break core/device into platform files
add Screen.retina? implementation for OS X
DRY HTTP network activity stuff
add example app
Merge branch 'master' into osx
Merge branch 'master' into osx
Merge branch 'master' into osx
restore Device#orientation
Fix iOS tests
move iOS spec files around
move device spec
move gestures spec
move around specs for platforms
setup project for testing on osx
refactor network activity into a method
annotate this OS X behavior