Removed gztar to avoid 'HTTPError: 400 Client Error: Only one sdist may be uploaded per release'

Author: mwetter

Makefile

@@ -41,7 +41,7 @@ doctest:
 dist:	clean doctest unittest doc
 	@# Make sure README.rst are consistent
 	cmp -s README.rst buildingspy/README.rst
-	python setup.py sdist --formats=gztar,zip
+	python setup.py sdist --formats=zip
 	python setup.py bdist_egg
 	rm -rf build
 	rm -rf buildingspy.egg-info