Its delicate solution. Added a note.

consistent.

- dont use python setup.py install . It does not work anymore if --prefix
  directory is not in PYTHONPATH.
- Use python setup.py bdist -d INSTALL_DIR and let cmake unarchive and copy it
  to desired location. This is much better solution.

untar this to destination.

[skip ci]

Conflicts:
	moose-core/CMakeLists.txt

can handle environment variables cleanly.

can handle environment variables cleanly.