create basic failing test case for inherited models and tracker
Add a CONTRIBUTING file
Fixup CONTRIBUTING file per Carl's suggestions
Merge pull request #62 from carljm/contributing-file

Add a CONTRIBUTING file
Update tox.ini for Django 1.6 stable branch, South supporting Py3.
Update .travis.yml.
Fix .travis.yml to not run tests against Django master with Python 2.6.
Use proper unittest test-skipping.
Don't use unnecessary quotes in .travis.yml.
Fix typo in .travis.yml.
Merge branch 'update-test-matrix' into test-skipping

* update-test-matrix:
  Fix typo in .travis.yml.
  Don't use unnecessary quotes in .travis.yml.
Merge pull request #63 from carljm/update-test-matrix

Update test matrix
Merge pull request #64 from carljm/test-skipping

Use real unittest test skipping.
Allow FieldTracker to work in child models

Fixes #57.
Note FieldTracker fix in CHANGES
Improve FieldTracker tests for inherited models
Add initial documentation (based on README)
Exclude docs html output from git
Remove documentation from README
Add setup.cfg for ``python setup.py build_sphinx``