Place video description in block element

The summary is passed to markdown, which will produce at least one
block-level element: a paragraph.
Since block elements are not allowed inside inline elements, change the
tag to div.
250. Constrain large images in video summary/description

Images might be larger than the summary/description container and will
stick out on the right. With this change images can be at most the width
of the container they are in.

Fixes: #250
Merge pull request #257 from squiddy/250-constraint-images

Constrain large images in video summary/description
Add test for steve.richardapi.get_video
Link to category metadata only when API is enabled

By default settings.API is False, and API urls are not included. The url
reverse on the category page will fail. Fix it by showing it
conditionally, exactly how it is done on the video page.
Merge pull request #258 from squiddy/fix-category-with-disabled-api

Link to category metadata only when API is enabled
add VideoUrlStatus to the admin so that we can look through missing links
Merge pull request #259 from willkg/videostatusadmin

add VideoUrlStatus to the admin so that we can look through missing links
change suggestion ordering and fix template
Merge pull request #260 from willkg/suggestionsadvice

change suggestion ordering and fix template
Update github urls

We moved this project from my username space (willkg) to the pyvideo org
space (pyvideo). This updates the relevant urls.
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.