Responded to pull request comments
* Instead of passing in the user object, just used Meteor.runAs()
* Added callback events to the client side

Delete Slack msgs from Rocket

Delete Rocket message from Rocket

Delete Rocket msg from Slack

Updated startup connection logic and refactored method/variable names to clarify between Rocket and Slack

Re-add escape to topic message;
Add option to send or not send message on saving room settings

* Remove double error trhow

* Fix channel name changed

* Fix not sending notifications for old messages

* Add option to silence adding users to room

* Silence adding existing users to room

* Add try/catch in set avatar to prevent timeout issues

* Save topic message in correct date/time

* Add logs

* moving from coffee to js

* renaming method