Clean up and add functionality

After reading [a blog post](http://statico.github.com/vim.html)
on vim usage of a guy who has used Vim for 11 years, I decided
to clean up my vim config a little.

Finally I have now swapped out CommandT with CtrlP. This will
be a huge time saver. Especially since it has a refresh function
hotwired, which I never got working properly with CommandT.

I now also have a syntax checking plugin for other languages
than erlang.

NERDTree is now also integrated as a pathogen plugin.
This moves us ahead by a lightyear. The old version was
statically part of this repo.