Make disable scrolling optional for offcanvas. Fixes #193

docs/javascript.html

@@ -180,6 +180,12 @@ $('.navmenu').offcanvas()
           <td>true</td>
           <td>Calculate if off canvas should be disabled for this viewport width on window resize. If your elements always gets hidden on window resize, try setting this to false.</td>
         </tr>
+        <tr>
+          <td>disableScrolling</td>
+          <td>boolean</td>
+          <td>true</td>
+          <td>Disable scrolling when the off canvas element is shown, by setting overflow to hidden for the body.</td>
+        </tr>
       </tbody>
     </table>
     

js/offcanvas.js

@@ -44,7 +44,8 @@
     toggle: true,
     placement: 'left',
     autohide: true,
-    recalc: true
+    recalc: true,
+    disableScrolling: true
   }
 
   OffCanvas.prototype.offset = function () {
@@ -170,7 +171,7 @@
     
     if (elements.index(this.$element) !== -1) this.$element.css(placement, -1 * offset)
 
-    this.disableScrolling()
+    if (this.options.disableScrolling) this.disableScrolling()
     
     var complete = function () {
       this.state = 'slid'