Use the official tomdoc.vim repository

https://github.com/duwanis/tomdoc.vim is the offical tomdoc.vim repo,
and has a few extra changes in it that mutewinter's fork does not. This
commit adjusts the readme and updates the after/coffee.vim and
after/ruby.vim files to reflect the latest changes for this plugin.
Merge pull request #3 from duwanis/use_official_tomdoc_vim

Use the official tomdoc.vim repository