Remove syntax not available in python 2.6
Have the same pep8 ignores for tox and run_tests.sh
Merge pull request #91 from ameade/fix-py26

Remove syntax and unittest functions not available in python 2.6
Merge pull request #92 from ameade/fix-tox-pep8

Have the same pep8 ignores for tox and run_tests.sh