Added $compile for the step's html so that ng-click works (#33)

* Added $compile for the step's html so that ng-click can be used inside the help text.

dist/nz-tour.js

@@ -77,8 +77,9 @@
                     service.current = false;
                     if(func) {     
                         return func();
-                    } 
-                    return true;
+                    } else {
+                        return true;
+                    }
                 });
         }
 
@@ -175,7 +176,6 @@
                     service.cleanup();
                 }, service.current.tour.config.animationDuration);
             }
-           // return $q.when(null);
         }
 
         function doStep(direction) {
@@ -219,8 +219,9 @@
                     service.current = false;
                     if(func) {     
                         return func();
-                    } 
-                    return true;
+                    } else {
+                        return true;
+                    }
                 });
         }
 
@@ -258,7 +259,7 @@
         }
     }]);
 
-    module.directive('nzTour', ["$q", function($q) {
+    module.directive('nzTour', ["$q", "$compile", function($q, $compile) {
         return {
             template: [
                 '<div id="nzTour-box-wrap">',
@@ -496,8 +497,11 @@
                         showNext: steps[step].showNext === undefined ? config.showNext : steps[step].showNext,
                         showPrevious: steps[step].showPrevious === undefined ? config.showPrevious : steps[step].showPrevious
                     };
-                    //Don't mess around with angular sanitize for now. Add compile and sanitize later...
-                    els.innerContent.html(steps[step].content);
+                    var stepHtml =  steps[step].content;
+                    // Compile the step definition html so ng-click works as expected.
+                    var compiledHtml = $compile(stepHtml)($scope);
+                    els.innerContent.html(compiledHtml);
+
                     // Scroll Back to the top
                     els.content.scrollTop(0);