Add reload function to expiration function. Fixed #84 issue

Author: romelgomez

.gitignore

@@ -1,5 +1,6 @@
 # IDE Files
 .idea/*
+angular-recaptcha.iml
 
 # OS Files
 .DS_Store

demo/usage.html

@@ -43,6 +43,8 @@
                 $scope.cbExpiration = function() {
                     console.info('Captcha expired. Resetting response object');
 
+                    vcRecaptchaService.reload($scope.widgetId);
+
                     $scope.response = null;
                  };