Perform PEP8 cleanup for primary daguerre modules
Minor tweaks to previous PEP8 work.
PEP8-ified tests.
Merge branch 'master' into issue-37

Conflicts:
	daguerre/models.py
	daguerre/tests/unit/test_views.py
	daguerre/utils/adjustments.py
Merge branch 'issue-37'