[xcassets] Compile resources_dirs/*.xcassets into the app bundle.
[xcassets] Don’t delete compiled assets from the app bundle.
[xcassets] actool uses path info from bundle unless full build path is specified.
[xcassets] Do not include uncompiled asset bundles in the product.
[xcassets] Copy and configure the app icons for iOS.
Test branch notifications in HipChat commit.
[xcassets] Use `App.warn` to warn about multiple app icon sets.
[xcassets] Fail build if the JSON gem is required and unavailable.
[xcassets] Make asset compilation and app icon config work on OS X.
[xcassets] Fix preservation of app icons on iOS.
[xcassets] No longer copy icons ourselves on iOS.
[xcassets] Use actool’s Info.plist output instead of reading JSON.
[xcassets] Use output of actool to determine compiled assets to preserve.
[xcassets] Move iOS/OS X specific behavior back to configs.
[xcassets] Simplify actool output parsing and only print in verbose mode.
[xcassets] Extract actool warnings and propagate to the user.
[xcassets] Be sure to remove whitespace from Info.plist icon names.
[xcassets] Show compile info to user when not in verbose mode.
[xcassets] All files that are to be preserved are in `preserve_resources`.
[xcassets] Fix comment.