new animated-screenshots

- half size: 1465 KB -> 641KB
- mutch better quality
- no MakeAGIF.com branding
- HTTPS link (via github gist) so there is no github-camo proxy needed (camo makes this image loading 0.55s slower in my short test)
- all source-files are available here: https://gist.github.com/fnkr/2f9badd56bfe0ed04ee7

README.md

@@ -2,7 +2,7 @@
 
 ![logo](https://raw.github.com/gitlabhq/gitlabhq/master/public/gitlab_logo.png)
 
-![animated-screenshots](http://makeagif.com/media/6-23-2013/AN3Mo6.gif)
+![animated-screenshots](https://gist.github.com/fnkr/2f9badd56bfe0ed04ee7/raw/compiled.gif)
 
 ### GitLab allows you to
  * keep your code secure on your own server