Do not check vundle into repo

Steps to take on new machine
- git clone git@github.com:FreekKalter/vim.git .vim
- ln -s .vim/.vimrc .vimrc
- cd .vim
This clone must be done manually, not by checking it into
Freekkalter/vim.git
- git clone https://github.com/gmarik/Vundle.vim.git bundle/vundle
- run PluginInstall inside vim