Add tox.ini for Tox (http://tox.testrun.org). MANIFEST.in also required to...

Add tox.ini for Tox (http://tox.testrun.org). MANIFEST.in also required to make sure all needed docs and tests get into the sdist.

MANIFEST.in

+include README.txt
+include CHANGES.txt
+recursive-include hexagonit *

tox.ini

+# Tox (http://tox.testrun.org/) is a tool for running tests
+# in multiple virtualenvs. This configuration file will run the
+# test suite on all supported python versions. To use it, "pip install tox"
+# and then run "tox" from this directory.
+
+[tox]
+envlist = py26, py27
+
+[testenv]
+commands = python setup.py test
+deps =
+    zc.buildout==1.6.3