Implement TwitterClient.direct_messages
Implement TwitterClient.direct_messages_sent
Change id params to be string for TwitterClient.direct_messages and .direct_messages_sent
Implement TwitterClient.direct_messages_show
Implement TwitterClient.direct_messages_destroy
Document required fields for TwitterClient.direct_messages_show and direct_messages_destroy
'user' -> 'authenticating user' for TwitterClient's direct message methods' docstrings
Implement TwitterClient.direct_messages_new
Merge branch 'develop' into feature/issue-8-dms
Remove TODOs for direct message tests for TwitterClient
Add tests for error cases for TwitterClient's direct message methods
Merge branch 'feature/issue-8-dms' into develop