Update sourceLoading for compatibility with cpython 2.6, 2.7, 3.3, 3.4, and pypy
Update sourceLoading for compatibility with cpython 2.6, 2.7, 3.3, 3.4, and pypy

kquick/Thespian,kquick/Thespian,godaddy/Thespian,godaddy/Thespian