Merge pull request #1799 from RocketChat/add-livechat-as-default

.meteor/packages

.meteor/versions

client/startup/defaultRoomTypes.coffee

packages/rocketchat-lib/README.md

packages/rocketchat-lib/client/lib/roomTypes.coffee

packages/rocketchat-livechat/client/ui.js

packages/rocketchat-livechat/config.js

...etchat-livechat/server/models/LivechatDepartmentAgents.js

packages/rocketchat-livechat/server/models/Users.js

packages/rocketchat-ui-sidenav/side-nav/sideNav.coffee

packages/rocketchat-ui-sidenav/side-nav/sideNav.html

packages/rocketchat-ui/lib/accountBox.coffee