Merge pull request #2 from tspascoal/master

Ignore hubot own messages, fix reply command, add support for authorizations
updated version
Set room in author when receive a message
Merge pull request #3 from bfcamara/fix-room-user-not-set

Set room in author when receive a message
updated version
Fix the way user data was stored in brain.
  There was no side effects everything worked, but now it is correct.
  Only try to process message.posted event types