Problem:
We will need to start moving our current RESTful API to use API Tokens before other services can be built to use tokens.

Acceptance Criteria:
All current RESTful /api/ urls use/accept API Tokens for Authentication.
Remove non-versioned API URLs.
Return appropriate HTTP code when failures occur (such as token is missing)
Code is unit tested.

Note: Token may be provided as query parameter or header.

Examples:
/api/v1/dataset/{dataset_short_name}/file/{file_name}?api-token={api_token}

or in the header...

Authorization: api-token {api_token}