Automatically reload .vimrc when it is saved

Taken from:

  https://gist.github.com/nocash/1988620

via:

  http://vimbits.com/bits/128
Improve vim statusline

This makes the statusline more useful. Taken from Wincent:

  https://github.com/wincent/wincent/blob/master/.vim/plugin/statusline.vim