Replace AFNetworking

Use built-in JSONSerialization, lighter NSOperation.
Network status helper
registerClasses, changeSelfPassword
Merge branch 'rac_compat_api' of github.com:fauna/fauna-ios into rac_compat_api

Conflicts:
	Fauna/Client/FNContext.m
all class timelines, destroy
update example appl
move example app to Examples dir
consistent naming
license