Update Twitterbot version from 1.6.1 to 1.9.1
Merge pull request #119 from geeknik/master

Update BOT_VERSION in twitter/ircbot.py from 1.6.1 to 1.9.1
I figured this was an oversight, so I updated BOT_VERSION from 1.6.1 to 1.9.1 to match the version of the base package.