fix(date): add YYYY/MM/DD format

public/js/controllers/settingsCtrl.js

@@ -65,7 +65,7 @@ habitrpg.controller('SettingsCtrl',
       User.set({'preferences.language': $scope.language.code});
     }
 
-    $scope.availableFormats = ['MM/dd/yyyy','dd/MM/yyyy'];
+    $scope.availableFormats = ['MM/dd/yyyy','dd/MM/yyyy', 'YYYY/MM/DD'];
 
     $scope.reroll = function(){
       User.user.ops.reroll({});

src/models/user.js

@@ -278,7 +278,7 @@ var UserSchema = new Schema({
     automaticAllocation: Boolean,
     allocationMode: {type:String, enum: ['flat','classbased','taskbased'], 'default': 'flat'},
     costume: Boolean,
-    dateFormat: {type: String, enum:['MM/dd/yyyy', 'dd/MM/yyyy'], 'default': 'MM/dd/yyyy'},
+    dateFormat: {type: String, enum:['MM/dd/yyyy', 'dd/MM/yyyy', 'YYYY/MM/DD'], 'default': 'MM/dd/yyyy'},
     sleep: {type: Boolean, 'default': false},
     stickyHeader: {type: Boolean, 'default': true},
     disableClasses: {type: Boolean, 'default': false},