added vim, pathogen, vimrc

I love using vim. The best way to install plugins for vim and extend it is using the amazing tpope's pathogen. The all-time easiest way to get started I found so far is using amix's vimrc script. To install it, just run the install_awesome_vimrc.sh (recommended version ;) ) and then add your own custom settings and color scheme on ~/.vim_runtime/my_configs.vim