Move files into src directory
Update editorconfig for yml files
Update settings and tox for file movement
Ignore more auto-created files / folders
First iteration of moving to django-configurations
Change to django-configurations

There's a LOT of movement and re-writing of comments. End results, the
base settings should be the same, and the comments should link to the
current django documentation. The structure is mainly based on
django-cookiecutter, but I didn't add settings from that. I just moved
though around to line up (mostly) with it.
Update docs for configurations / layout changes

Also fixup a bit about requirements.txt files (which are gone)
Removed unused settings_local template
Seems I can't make a PR without killing travis

It's just so easy to screw up.
Merge branch 'pr-248-settings'