Documentaion link correction

Author: anujaware

README

@@ -15,7 +15,7 @@
   gem install docsplit
 
   For documentation, usage, and examples, see:
-  http://documentcloud.github.com/docsplit/
+  https://documentcloud.github.io/docsplit/
 
   To suggest a feature or report a bug: 
   http://github.com/documentcloud/docsplit/issues/