cleaning up osx environment cruft for python3.3 that was causing test_environment to fail on osx py3.3
cleaning up osx environment cruft for python3.3 that was causing test_environment to fail on osx py3.3

hacosta/python-sh,hacosta/python-sh,achernet/sh,z-fork/sh,ppannuto/sh,lwgarmstrong/sh,twocngdagz/sh,simudream/sh,amoffat/sh,pombredanne/sh,jakirkham/sh,amoffat/sh,pdelong42/sh,germangh/sh,rdhyee/sh,Stupeflix/sh,rsmith31415/sh