Merge pull request #1 from toco/master

Category prefixing and string constants
Adding dependency badge to the README
Merge pull request #2 from reiz/master

Adding dependency badge to the README
Update AFNetworking to 2.2.0
Bump version to 0.0.2
Update to AFNetworking 2.2.0
Use development pod
Remove sources as they are included in the development pod
Cleanup test import
Remove coveralls
Resolve deprecation warnings and add error handling for `requestWithMethod:URLString:parameters:error:`
Fix imports in test
Move XNGOAuth1RequestSerializer private properties to private header
Move XNGOAuthToken private properties to private header