Add a ng-intro-refresh-method attribute

Add a ng-intro-refresh-method attribute defining a function to call to manually refresh IntroJs object

Author: Eckerdecker

src/angular-intro.js

@@ -22,6 +22,7 @@
                 ngIntroExitMethod: "=?",
                 ngIntroNextMethod: "=?",
                 ngIntroPreviousMethod: "=?",
+                ngIntroRefreshMethod: "=?",
                 ngIntroOptions: '=',
                 ngIntroOncomplete: '=',
                 ngIntroOnexit: '=',
@@ -118,6 +119,10 @@
                     }
                 };
 
+                scope.ngIntroRefreshMethod = function () {
+                    intro.refresh();
+                };
+
                 var autoStartWatch = scope.$watch('ngIntroAutostart', function () {
                     if(scope.ngIntroAutostart){
                         $timeout(function() {