Adding application only oauth:
Adding method for obtaining an application only oauth token from twitter along with some customized errors
Adding InvalidateToken function:
Adding a function to the ApplicationOnly struct to invalidate an authentication token
Adding my name to authors, and adding more files to the gitignore
Forgot to add tweetlib pacakge name to docs
Abstracting all errors to separate module.
Merge branch 'master' of github.com:hahnicity/tweetlib
Removing separate status code check from oauth.go:
It was redundant. Replaced it with the checkResponse function from client.go
Integrating application-only calls into the client.
Made some minor modifications to the client so that we can now make calls from applications only.
Merge pull request #2 from hahnicity/master

Adding Methods For Application Only OAuth. Thanks hahnicity.