deb: depend on libnix 0.9.3
setup.py: catch exception in pkg_config()
info.py: set version to 0.9.4
setup.py: failsafe pkg_config()
setup.py: catch exception in pkg_config()
info.py: set version to 0.9.4
deb: changlog update to version 0.9.4
deb: changelog version update to 0.9.5
setup.py: failsafe pkg_config()
deb: add dependency to pkg-config
setup.py: failsafe pkg_config()

Conflicts:
	debian/changelog
	nix/info.py
	setup.py
Merge branch 'master' into debian