feat($ionicSideMenuDelegate): add isOpen() method

Closes #1074. Closes #1075.

Author: rvanbaalen

Diff for: js/controllers/sideMenuController.js

@@ -117,7 +117,7 @@
     },
 
     isOpen: function() {
-      return this.getOpenRatio() == 1;
+      return this.getOpenAmount() !== 0;
     },
 
     /**

Diff for: js/ext/angular/src/directive/ionicSideMenu.js

@@ -85,6 +85,12 @@ angular.module('ionic.ui.sideMenu', ['ionic.service.gesture', 'ionic.service.vie
    * opened/opening, and between 0 and -1 if right menu is opened/opening.
    */
   'getOpenRatio',
+  /**
+   * @ngdoc method
+   * @name $ionicSideMenuDelegate#isOpen
+   * @returns {boolean} Whether either the left or right menu is currently opened.
+   */
+  'isOpen',
   /**
    * @ngdoc method
    * @name $ionicSideMenuDelegate#isOpenLeft

Diff for: test/unit/controllers/sideMenuController.unit.js

@@ -104,6 +104,25 @@ describe('SideMenuController', function() {
     expect(ctrl.getOpenPercentage()).toEqual(0);
   });
 
+  it('should isOpen', function() {
+    expect(ctrl.isOpen()).toEqual(false);
+    ctrl.toggleLeft();
+    expect(ctrl.isOpen()).toEqual(true);
+    ctrl.toggleLeft();
+    expect(ctrl.isOpen()).toEqual(false);
+    ctrl.toggleLeft();
+    expect(ctrl.isOpen()).toEqual(true);
+    ctrl.toggleLeft();
+    
+    expect(ctrl.isOpen()).toEqual(false);
+    ctrl.toggleRight();
+    expect(ctrl.isOpen()).toEqual(true);
+    ctrl.toggleRight();
+    expect(ctrl.isOpen()).toEqual(false);
+    ctrl.toggleRight();
+    expect(ctrl.isOpen()).toEqual(true);
+  });
+
   it('should isOpenLeft', function() {
     expect(ctrl.isOpenLeft()).toEqual(false);
     ctrl.toggleLeft();