Initial versions of python and libffi.
Add bzip2 package and spack pkg add command.
Fix for SPACK-11: Spack compiler wrapper is now in bash.

- Startup is much faster
- Added test for compiler wrapper parsing.
- Removed old compilation module that had to be imported by old cc.
- Removed cc from python version checks now that it's bash.
Working Python 2.7.8, ncurses, readline
Initial versions of Qt and some dependencies.
gnutls, nettle, wget, dbus