Release as a universal wheel

By releasing as a [Python wheel](http://pythonwheels.com/) as well as a source distribution, you can speed up end user’s installs. After merging this command, to release you just need to run `python setup.py clean sdist bdist_wheel upload`.

1 files changed, 3 insertions, 0 deletions

diff --git a/setup.cfg b/setup.cfg
index 7be406d..6d68f65 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,3 +1,6 @@
+[bdist_wheel]
+universal = 1
+
 [egg_info]
 tag_build = dev