Added flake8 instead of pyflakes to tox

mend

Fixed tabbing
Merge pull request #271 from astephen2/alexstep_tox_pyflakes

Added flake8 instead of pyflakes to tox
Fix #240 moar.
Merge pull request #274 from asottile/fix_240_moar

Fix #240 moar.
Update to testify 0.5.5

python-testify (0.5.5) lucid; urgency=low

  * Fix (run, test) ordering check in test_runner_server_test (asottile, #255)
  * Enable retries in sql reporter for SQL connection (bukzor, #249)
  * Dynamically annotate unittests (astephen2, #241)