move static symlink
bare-bones s3 upload script
update configurable values

- make SECRET_KEY a required config value
- add s3 access config
add a default avatar url
add route for signing avatar s3 uploads
example of front-end s3 upload
add logout route
docs on s3 and static content
Merge branch 'feature/question-completion' into feature/s3-storage
more S3 instructions
emp on not committing keys
no more sqlite
newer pylint
ignore more os-generated files
remove docs and tests from slug
respect avatar_url having a default value
Merge branch 'feature/s3-storage'
add CRUD for video links on quests
link to back-end docs
detailed instructions for fulfilling requirements