First stab at the new HTTP client API
Implement responseClass and modelClassesByResourcePath
Clients can specify a model for error responses
Add response class
Fix response serialization in OVCResponse
Make OVCHTTPSessionManager header public
Add URL matcher helper class
Rename errorResultClass to errorModelClass
Update model serializer to use URL matcher and managed object context
Remove deprecated code
Organize sources
Finish implementation
Add OVCResponse tests
Update OVCModelResponseSerializer tests
Add OVCManagedStore helper class
Add managed object serialization test
Make sure error responses are not persisted
Add OVCHTTPRequestOperationManager tests
Add OVCHTTPSessionManager + tests
Remove OCMock from test dependencies