Add /usr/local/bin|sbin to $PATH
use reattach-to-user-namespace in tmux on osx
Add a color database
Keep installing M2Crypto

I'm still having problems when it gets installed during a requirements
setup and I still don't know why.

This reverts commit ef828fc15e70813fad44cbfcfa9208d1c93b7777.
remove some vim cruft