chore(changelog) Improve v2.0 changes description

Author: Sofia

changelog.md

@@ -1,9 +1,8 @@
 # Changelog
 ```
 2.0 - December 31, 2015
-- Ionic update to v1.2.1 as it has been lately announced on Official Ionic Blog (http://blog.ionic.io/announcing-ionic-1-2/).
-- New module demonstrating Native Scrolling
-- New module demonstrating New Slide Box
+- Ionic update to v1.2.1
+- Demonstration examples of Native Scrolling as it is now Ionic's default and Ionic's Slide Box based on Swiper widget (http://blog.ionic.io/announcing-ionic-1-2/)
 
 1.2 - December 22, 2015
 - Downgrade Cordova iOS to 3.9.2 so there is no conflict with the plugins used