Update the packaging so wheels work

tox.ini

@@ -108,6 +108,19 @@ deps =
 commands =
     python setup.py check -r -s
 
+[testenv:release]
+skipsdist = true
+basepython = python3
+skip_install = true
+use_develop = false
+deps =
+    wheel
+    setuptools
+    twine >= 1.5.0
+commands =
+    python setup.py -q sdist bdist_wheel
+    twine upload --skip-existing dist/*
+
 # Flake8 Configuration
 [flake8]
 # Ignore some flake8-docstrings errors