Changed usr/bin/python to use/bin/env python
Improved thread check in irp_stack
replacing #!/usr/bin/python with #!/usr/bin/env python
Merge branch 'master' of https://github.com/eth-cscs/irpf90

Conflicts:
	src/codelet.py
	src/cython_setup.py
	src/irpf90.py
	src/irpf90_indent.py
	src/profile.py
	src/vim.py