refactor(AMD/CommonJS exported module): Export module name instead of module object

When the module is imported using AMD/CommonJS, it is expected to expose its name instead of the
Angular module object. This is because angular.module() expects the dependencies as string instead
of actual module objects.

Fix #326. Breaking change: code that relies on the module object to be exported (accessing the name
via `.name` for example) will break, since the name is now directly returned.

Author: Gael du Plessix

dist/rzslider.css

@@ -1,7 +1,7 @@
 /*! angularjs-slider - v4.0.2 - 
  (c) Rafal Zajac <rzajac@gmail.com>, Valentin Hervieu <valentin@hervieu.me>, Jussi Saarivirta <jusasi@gmail.com>, Angelin Sirbu <angelin.sirbu@gmail.com> - 
  https://github.com/angular-slider/angularjs-slider - 
- 2016-06-29 */
+ 2016-06-30 */
 .rzslider {
   position: relative;
   display: inline-block;

dist/rzslider.js

@@ -1,7 +1,7 @@
 /*! angularjs-slider - v4.0.2 - 
  (c) Rafal Zajac <rzajac@gmail.com>, Valentin Hervieu <valentin@hervieu.me>, Jussi Saarivirta <jusasi@gmail.com>, Angelin Sirbu <angelin.sirbu@gmail.com> - 
  https://github.com/angular-slider/angularjs-slider - 
- 2016-06-29 */
+ 2016-06-30 */
 /*jslint unparam: true */
 /*global angular: false, console: false, define, module */
 (function(root, factory) {
@@ -2108,5 +2108,5 @@
 
 }]);
 
-  return module
+  return module.name
 }));

dist/rzslider.min.css

@@ -2105,5 +2105,5 @@
 
   /*templateReplacement*/
 
-  return module
+  return module.name
 }));