runtests.py should return the error code from nosetests so travis knows it's failed
fix setupmono.py to work with python 2.6 and add to travis
fix bug where converting a UInt32 doesn't raise an OverflowError
raise an exception if any tests fail instead of returning the result
Merge pull request #10 from tonyroberts/travis-ci

fix all unit tests and add python 2.6 build to travis