add py33 to tox
fix repr in message tests
update celery version
make celery behave under 3.3
fix regex
fix regex test for 2.6
add utils
correct location of skipIf
fix missing Task object
fix pep8 errors
add 3.3 to README
add python 3.3 to docs
add python 3.3 to setup.py
Merge branch 'feature/py3.3' into develop