PLD: make comments flake8
Merge pull request #496 from onaio/318-attachment-api-endpoint

318 attachment api endpoint
UK: test UnicodeDecodeError is raised when setting title in xform xml
UK: ensure we convert the xml to utf-8 before we replace the title, closes #495
UK: update failing unicode error test to indicate fix
ME: added a quick fix code will be refactored in the next commits
ME: refactored clone api endpoint and added a test for it
ME: WIP accessing endpoint now clones xform using serializer save method
ME: when a form is cloned, the cloned xform data is returned
ME: added clone API endpoint test in text_xform_viewset.py that pass
ME: added documentation for clone endpoint functionality
ME: used flakek8 to correct code constructs
ME: added a quick fix code will be refactored in the next commits
ME: refactored clone api endpoint and added a test for it
ME: WIP accessing endpoint now clones xform using serializer save method
ME: when a form is cloned, the cloned xform data is returned