SpaceAPI support

[eastein]

What

The SpaceAPI is a JSON REST HTTP API for providing metadata about hackerspaces.

https://hackerspaces.nl/spaceapi/

What To Implement

Offer multiple options; there's no reason that one system can't have more than one SpaceAPI endpoint. A spaceapi stanza shall have the following fields:

• metadata: The dictionary of data that the SpaceAPI specifies, except for the open, api, events, lastchange, and status fields.
• cameras: A list of tuples of camname, level. Each camera is recognized as being active if the ratio is at least level.
• needed_activity: How many cameras must be considered active before the space is considered open.

[eastein]

Check TODOs in above commit before closing - there's stuff to do.

[eastein]

Calling this done - it works!

There's a running endpoint for PS:One at http://space.pumpingstationone.org:8000/spaceapi/ps1