I want my arrow keys back.
Add NERDTree back in.
Add expanderrific.vim NERDTree plugin.

* Allow right/left to expand/collapse NERDTree dirs in a more meaningful way.
Edit .vimrc/.gvimrc relative to ~/.dotfiles dir.
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Edit .vimrc/.gvimrc relative to ~/.dotfiles dir.
  Add expanderrific.vim NERDTree plugin.
  Add NERDTree back in.
  I want my arrow keys back.