Update docs
Number installation options
Convert to new Locations Format

Locations becomes an array of available media. Create and Update
methods accept an array of mime types. If a particular peice of media
has multiple representations they should be sent as a comma-seperated
string of mime types.

Examples:

two jpeg images

```
"locations": ["image/jpeg", "image/jpeg"]
```

A single video encoded multiple ways

```
"locations": ["video/webm,video/mp4"]
```

Closes #369 Closes #341
Merge pull request #376 from edpaget/subject-api

Convert to new Locations Format
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
show polymorphic project owner in create response
Remove superfluous "rm -f" and use exec in start.sh
Merge pull request #390 from astopy/foreman-tidying

Remove superfluous "rm -f" and use exec in start.sh
Update restpack in Gemfile.lock
Merge pull request #2 from edpaget/project_polymorphic_links

Update restpack in Gemfile.lock
Merge pull request #389 from camallen/project_polymorphic_links

show polymorphic project owner in create response