adds default license to all python source files where missing

excluded (different license):
* ./src/support/xmlrunner.py
* ./src/pyphant/pyphant/wxgui2/pyphantLogo.py
* ./src/pyphant/pyphant/core/bottle.py
* ./src/pyphant/pyphant/core/singletonmixin.py
* ./doc/logo/mklogo.py
* ./doc/logo/pyphantLogo.py

excluded (unknown / delayed)
* ./doc/test_numpy1.0.1Bug.py
* ./doc/grammarDoc.py