[#1832] remove relative-date, use moment instead

package.json

@@ -19,7 +19,6 @@
     "superagent": "~0.12.4",
     "resolve": "~0.2.3",
     "expect.js": "~0.2.0",
-    "relative-date": "~1.1.1",
     "lodash": "~2.2.1",
     "async": "~0.2.9",
     "optimist": "~0.5.2",

public/js/controllers/rootCtrl.js

@@ -41,6 +41,7 @@ habitrpg.controller("RootCtrl", ['$scope', '$rootScope', '$location', 'User', '$
      */
     _.defaults($rootScope, window.habitrpgShared.algos);
     _.defaults($rootScope, window.habitrpgShared.helpers);
+    $rootScope.moment = window.moment;
 
     $rootScope.set = User.set;
     $rootScope.authenticated = User.authenticated;

views/options/social/chat-message.jade

@@ -5,6 +5,6 @@ li(ng-repeat='message in group.chat', ng-class='{highlight: isUserMentioned(user
   span(ng-bind-html="message.text | linky:'_blank'")
   |  - 
   span.muted.time
-    | {{relativeDate(message.timestamp, _currentTime) + ' '}}
+    | {{moment(message.timestamp).fromNow() + ' '}}
   a(ng-show='user.contributor.admin || message.uuid == user.id', ng-click='deleteChatMessage(group, message)')
     i.icon-remove(tooltip='Delete')