Update use of $timeout function to be compatible with angular 1.3

package.json

@@ -1,6 +1,6 @@
 {
   "name": "angular-signature",
-  "version": "1.0.3",
+  "version": "1.0.5",
   "description": "HTML5 canvas based smooth signature drawing as angularJS directive",
   "main": "src/signature.js",
   "scripts": {

src/signature.js

@@ -18,6 +18,7 @@ angular.module('signature').directive('signaturePad', ['$interval', '$timeout',
       scope: {
         accept: '=?',
         clear: '=?',
+        updateModel: '=?',
         disabled: '=?',
         dataurl: '=?',
         height: '@',
@@ -47,7 +48,7 @@ angular.module('signature').directive('signaturePad', ['$interval', '$timeout',
              defer handling mouseup event until $scope.signaturePad handles
              first the same event
              */
-            $timeout().then(function () {
+            return $timeout(function () {
               $scope.dataurl = $scope.signaturePad.isEmpty() ? EMPTY_IMAGE : $scope.signaturePad.toDataURL();
             });
           };
@@ -89,7 +90,7 @@ angular.module('signature').directive('signaturePad', ['$interval', '$timeout',
           scope.signaturePad.clear();
           scope.signaturePad.fromDataURL(dataUrl);
 
-          $timeout().then(function() {
+          $timeout(function () {
             ctx.setTransform(1, 0, 0, 1, 0, 0);
             ctx.scale(1 / scale, 1 / scale);
           });