Update docs
Number installation options
Allow ids to be either strings or integers

Closes #372
Add Content-Type to Signed-URL

Closes #346
Merge pull request #383 from edpaget/signed-urls

Add Content-Type to Signed-URL
Add tutorial subject link to workflows

Closes #288
Merge pull request #378 from edpaget/fix-schema-ids

Allow ids to be either strings or integers
Merge pull request #385 from edpaget/add-tutorial-subject

Add tutorial subject link to workflows
Don't 422 on bad cellect params
Fix step number
Merge branch 'docs'
Merge pull request #388 from edpaget/fix-cellect-params-errors

Don't 422 on bad cellect params
Run under supervisor in production