Add light-weight feature management
Remove disabled features from the menu
Only replace assets in Pods directory during build

Otherwise, we won't be able to generate multiple
builds with desired images.

See this issue in Github for more detail:
https://github.com/CocoaPods/CocoaPods/issues/1546
Create a new target named Brand-B

* Add colors.plist file
* Move info plist to Brand-B group
* Move assets that only apply to Brand-A to Brand-A group
Create a new target named Brand-C

* Add colors.plist file
* Move info plist to Brand-C group
* Create a new asset catalog that contains
Brand-C specific images