Update travis config to use flakes8 in place of pyflakes
Fix pep8 violations in root folder
Fix flakes8 errors in resources init
Fix flakes8 issues in base resource
Fix flakes8 issues in concept resource
Fix flakes8 issues in context resource
Fix flakes8 issues in exporter resource
Fix flakes8 issues in history resource
Fix flakes8 issues in pagination and preview resources
Fix flakes8 issues in query resource
Fix flakes8 issues in resource templates
Fix flakes8 issues in view resource
Fix flakes8 issues in field resource
Fix bad command name in travis config
Import forms instead of the individual objects
Merge pull request #95 from cbmi/flake8

Fully comply with pep8 and pyflakes best practices