Revert "Revert "Merge pull request #136 from iiirc/bundle-update""

This reverts commit 87e6cab5eb5dc0e1a2707c0dd736286d6fe23708.
Follow Twitter gem version up
Change key
Initialize Twitter in TweetBot
Fix tests to follow Twitter gem update
Merge pull request #139 from iiirc/yet-another-update-twitter-gem

Yet another update twitter gem