Update manifest

MANIFEST.in

@@ -1 +1,12 @@
-recursive-include supervisor *.rst *.txt *.html *.css *.gif *.png
+include CHANGES.txt
+include COPYRIGHT.txt
+include LICENSES.txt
+include README.rst
+include TODO.txt
+include tox.ini
+include supervisor/version.txt
+include supervisor/skel *.conf
+include supervisor/tests/fixtures *.conf
+recursive-include supervisor/ui *.html *.css *.png
+recursive-include docs *.rst *.css *.gif *.png
+recursive-exclude docs/.build *