add mentions to readme

README.md

@@ -3,6 +3,13 @@ A small clone of [1024](https://play.google.com/store/apps/details?id=com.veewo.
 
 Made just for fun. [Play it here!](http://gabrielecirulli.github.io/2048/)
 
+### Contributions
+
+ - [TimPetricola](https://github.com/warmwaffles) added best score storage
+ - [chrisprice](https://github.com/chrisprice) added custom code for swipe handling on mobile
+
+Many thanks to [rayhaanj](https://github.com/rayhaanj), [Mechazawa](https://github.com/Mechazawa), [grant](https://github.com/grant), [remram44](https://github.com/remram44) and [ghoullier](https://github.com/ghoullier) for the many other good contributions.
+
 [![Screenshot](http://pictures.gabrielecirulli.com/2048-20140309-234100.png)](http://pictures.gabrielecirulli.com/2048-20140309-234100.png)
 
 That screenshot is fake, by the way. I never reached 2048 :smile: