.vim: added some new color schemes and the nerdtree plugin
vimrc updates: visualbell + autochdir
set up BSD ls to use similar colors to that of GNU ls
Appearance change, minor updates

* Changed appearance. We use 1 line instead of 3 now.
* Fixed some issues with VIMODE not being updated when the prompt is
   first generated.
* Note to self: An issue remains where being in in an ssh session and
   being root does not result in both a red username and a green
   hostname.
Fixed .zshrc to limit pwd size in prompt
Switched xargs to use -0 instead of the GNU --null option, added gcalcli alias
added wombat vim colorscheme, don't assume we have autochdir in vimrc
Added some growl stuff and other fixes
updated various things in .zshrc
removed some unmaintained stuff, add tmux stuff
cleaned up tmux.conf a bit
get rid of useless Makefile
update vimrc