Bump AFNetworking to v2.0.0
Fix ObjectCleanup category: Remove empty NSDictionary values
Fix TCAppPost JSON mapping
Add clientReceivedAt to TCPost
Add TCCredentialsPost & Add credentialsPost property to TCAppPost + TCAuthPost
Map app, auth, and credentials types to models in TCPost
Refactor initializing AFHTTPRequestOperation
Refactor link header parsing
Add request authentication method
Add error domains to TentClient
Add getPostWithEntity and getPostFromURL methods
Fix response status assertion
Update newPost method to set request body + Content-Type and Authorization headers