Merge pull request #911 from gfauchart/master

feat(menu): make the ion-menu threshold configurable

ionic/components/menu/menu-gestures.ts

@@ -9,7 +9,7 @@ export class MenuContentGesture extends SlideEdgeGesture {
     super(targetEl, util.extend({
       direction: (menu.side === 'left' || menu.side === 'right') ? 'x' : 'y',
       edge: menu.side,
-      threshold: 75
+      threshold: menu.threshold || 75
     }, options));
 
     this.menu = menu;

ionic/components/menu/menu.ts

@@ -95,7 +95,8 @@ import * as gestures from  './menu-gestures';
     'content',
     'id',
     'side',
-    'type'
+    'type',
+    'threshold'
   ],
   defaultInputs: {
     'side': 'left',