Added coverage

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/branches/0.7@2784 b32b6428-25c9-4566-ad07-03861ab6144f

libs/lib/tests/Makefile

+run:
+	python -m unittest -v
+
+cover:
+	cd ../xaal/lib/;coverage run --source=. -m unittest discover -v ../../tests/; coverage  html -d /tmp/coverage
+	
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