* Add ESLint rule `prefer-template`

* Add ESLint rule `template-curly-spacing `

* ESLint ignore rocketchat-livechat/assets/rocket-livechat.js

* Add ecmascript package to all packages

* Use ecmascript package for server and client on saml package

* Fix compilation

* ESLint add rule `object-shorthand`

* ESLint rocketchat-livechat/assets/rocket-livechat.js

* Add ecmascript package to all packages

* Use ecmascript package for server and client on saml package

* Fix compilation

* Add eslit rule `one-var`

* ESLint add rule `no-var`

* Add ecmascript package to all packages

* Use ecmascript package for server and client on saml package

* Fix compilation

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