Travis-CI: Specify IRC server/channel using a secure encrypted key
- This prevents our IRC dev channel #bbPress-dev from being notified when other people run bbPress' unit tests with travis-ci integration of their own Github forks.
- Key created using `travis encrypt "irc.freenode.net#bbpress-dev" -r bbpress/bbPress` results in IRC notifications only from the bbPress official GitHub repo https://github.com/bbpress/bbPress
- See http://docs.travis-ci.com/user/encryption-keys/

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5581 9866e705-20ec-0310-96e7-cbb4277adcfb