Redirect /chat to the #chef room logs on botbot.me

Instead of redirecting to the dashboard of botbot.me, redirect /chat to the Chef room logs.
Update spec for /chat redirect URL change

/chat now goes to the #chef on freenode logs instead of botbot.me's dashboard. This changes the spec to reflect that.
Make the botbot redirect URL have a trailing slash
Make the botbot spec URL have a trailing slash
Merge pull request #840 from opscode/chat-redirect-adjust

Chat redirect adjust