Make 'python -m sphinx' possible

sphinx/__main__.py

@@ -0,0 +1,14 @@
+# -*- coding: utf-8 -*-
+"""
+    Sphinx
+    ~~~~~~
+
+    The Sphinx documentation toolchain.
+
+    :copyright: Copyright 2007-2014 by the Sphinx team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+import sys
+from sphinx import main
+
+sys.exit(main(sys.argv))