Updates for latest Node.js and Hubot:

  * Merge in Wobot as Connector for easier maintenance
  * Port Connector to CS
  * Suppress node-stringprep warning from Connector startup
  * Use Hubot's robot.logger instead of console logging
  * Drop HUBOT_HIPCHAT_DEBUG in favor of HUBOT_LOG_LEVEL=debug
  * Update README with somewhat simpler installation instructions
  * Bump version to match latest hubot version
Update hcbot to hubot-hipchat for readability
Remove unused util fn
Issue #90 Add HUBOT_HIPCHAT_JOIN_ROOMS_ON_INVITE
Remove errant debug line
Fix disconnect message to not include @undefined
Simplify some logic and recycle user objects
Up v2.5.1.-2
Initial support for enter/leave messages
Add id to user object
Defer msg/presence events until roster is fetched
Fix broken use of FP promise lib in previous commit