nvda

c67b686b - setup.py: Import sourceEnv rather than relying on PYTHONPATH, as there is now more than just miscDeps/pytho that has to be included.

setup.py: Import sourceEnv rather than relying on PYTHONPATH, as there is now more than just miscDeps/pytho that has to be included. sconstruct no longer sets PYTHONPATH, as anything that needs it will also need the other paths from sourceEnv, so sourceEnv should be imported instead. sconstruct itself does import sourceEnv for txt2tags, etc.