Refactor au into ftplugin

After reading a tip in /r/vim and reading
'http://vim.wikia.com/wiki/Keep_your_vimrc_file_clean', and writting
too many au FileType in vimrc, I've decided to do it the right way.

* Create a 'vim_template' folder that will mirror '~/.vim'. ftplugin,
plugin, etc
* Create an install.sh script that will set the necessary links