ricardoper/TwitterOAuth — pull request #13 by GDmac (2014-09-13 09:16:09+00:00)
Title: Fix invalidate_token method

Leftover from refactoring into processTokenResponse()
invalidate_token() now works as advertised.

**Invalidate process (for the docs):**
Set consumer keys and call invalidate_token($token);
This will return token itself if correctly invalidated/revoked,
or will throw a twitter auth error (99) if credentials or token invalid.