Migrate README docs to sphinxdoc

Signed-off-by: martin f. krafft <madduck@madduck.net>
diff --git a/Makefile b/Makefile
index c3d5aa2..c04b663 100644
--- a/Makefile
+++ b/Makefile
@@ -28,3 +28,6 @@
 .PHONY: coverage
 .coverage: $(PYFILES)
 	python-coverage -x setup.py nosetests
+
+docs:
+	$(MAKE) -C doc man html