Mixed Python system confusion

Howdy,

I just installed your code and I wanted to point out that for mixed python systems, you have to edit the makefile and make sure virtualenv is choosing the correct binary.

I run arch, which has python3 by default.  

I think you should either include six and make sure everything runs in 3, or make your code aware that there may be python2 out there.  

Using "/usr/bin/env" may help you.
