feat(settings): add settings management (#906)

app/services/api/settingsService.js

@@ -0,0 +1,26 @@
+angular.module('portainer.services')
+.factory('SettingsService', ['$q', 'Settings', function SettingsServiceFactory($q, Settings) {
+  'use strict';
+  var service = {};
+
+  service.settings = function() {
+    var deferred = $q.defer();
+
+    Settings.get().$promise
+    .then(function success(data) {
+      var status = new SettingsViewModel(data);
+      deferred.resolve(status);
+    })
+    .catch(function error(err) {
+      deferred.reject({ msg: 'Unable to retrieve application settings', err: err });
+    });
+
+    return deferred.promise;
+  };
+
+  service.update = function(settings) {
+    return Settings.update({}, settings).$promise;
+  };
+
+  return service;
+}]);