Option to keep button enabled during ladda effect

bower.json

@@ -1,6 +1,6 @@
 {
   "name": "angular-ladda",
-  "version": "0.3.1",
+  "version": "0.3.2",
   "homepage": "https://github.com/remotty/angular-ladda",
   "authors": [
     "Chungsub Kim <subicura@subicura.com>"

dist/angular-ladda.js

@@ -73,6 +73,13 @@
             }
             if(!ladda.isLoading()) {
               ladda.start();
+              if( element.attr('data-keep-enabled') ) {
+                if (attrs.ngDisabled) {
+                  element.attr('disabled', scope.$eval(attrs.ngDisabled));
+                } else {
+                  element.removeAttr('disabled');
+                }
+              }                
             }
             if(angular.isNumber(loading)) {
               ladda.setProgress(loading);

src/angular-ladda.js

@@ -72,6 +72,13 @@
             }
             if(!ladda.isLoading()) {
               ladda.start();
+              if( element.attr('data-keep-enabled') ) {
+                if (attrs.ngDisabled) {
+                  element.attr('disabled', scope.$eval(attrs.ngDisabled));
+                } else {
+                  element.removeAttr('disabled');
+                }
+              }                
             }
             if(angular.isNumber(loading)) {
               ladda.setProgress(loading);

test/app/index.html

@@ -67,6 +67,7 @@
     <a class="btn btn-primary" ladda="true" ng-if="loader">ng-if true</a>
     <button id="btn" ladda="isLoading" ng-click="isLoading = true" class="btn btn-primary">{{ buttonText }}</button>
     <button ladda="true" class="btn btn-primary">ladda button</button>
+    <button ladda="true" data-keep-enabled="1" class="btn btn-primary">ladda button</button>
     <a class="btn btn-primary" ng-click="openModal()">open modal</a>
   </body>
 </html>