Added setup.cfg required by './bin/python setup.py build_sphinx; ./bin/python...

Added setup.cfg required by './bin/python setup.py build_sphinx; ./bin/python setup.py upload_sphinx'.

setup.cfg

+[build_sphinx]
+source-dir = docs
+build-dir  = sphinx
+all_files  = 1
+
+[upload_sphinx]
+upload-dir = sphinx/html
+