Add link to github pages

Author: onlywei

README.md

@@ -9,3 +9,5 @@ This is my first attempt at using both SVG and D3. I hope it is helpful to you.
 
 I upload the contents of this repository via FTP every once in a while to: http://www.wei-wang.com/ExplainGitWithD3/
 so you can just visit that site to use an (almost) up to date version.
+
+UPDATE: the page can now also be accessed via: http://onlywei.github.io/explain-git-with-d3/