Add notice that project is no longer maintained.

Author: JoelQ

README.md

@@ -1,5 +1,7 @@
 # ajax-datatables-rails
 
+**Important note: ajax-datatables-rails is no longer maintained. If you would like to take over the project, please contact me** 
+
 Datatables is a nifty jquery plugin that adds the ability to paginate, sort, and search your html tables. When dealing with large tables (more than a couple hundred rows) however, we run into performance issues. These can be fixed by using server-side pagination, but this breaks some datatables functionality.
 
 `ajax-datatables-rails` is a wrapper around datatable's ajax methods that allow synchronization with server-side pagination in a rails app. It was inspired by this [railscast](http://railscasts.com/episodes/340-datatables). I needed to implement a similar solution in a couple projects I was working on so I extracted it out into a gem.