First step towards dropdowns in the user list
User list in sidebar made into dropdown menu for admins, SASS implemented

Dropdown-menu simplifies UI, SASS makes everybody happy
Updating Backbone.js to 0.9.9 and Underscore to 1.4.3

Mainly for getting optional parameters in routes
Adding new route options

Makes it possible to let the signin page reflect pair or group chat
New goodbye view for handling pair room exits

Makes it easier to separate pair and group chat sessions