Add Githalytics code

I want to see how my project is faring. I hope the statistics will help me better understand my users.

README.md

@@ -13,3 +13,5 @@ Here is how the home page looks like
 This is how a generated article looks like
 
 ![Article screenshot](https://raw.github.com/talha131/pelican-elegant/master/article-screenshot.png)
+
+[![githalytics.com alpha](https://cruel-carlota.pagodabox.com/c71132a529c1c5d7eb8dc5ea4825a851 "githalytics.com")](http://githalytics.com/talha131/pelican-elegant)