API improvements

[peternewman]

No description provided.

[fxedel]

Looks good! Some new version 2 features could be useful for OpenLightingProject/open-fixture-library#287.

[peternewman]

Yes, that's part of the hope @fxedel . I need to sanity check this, as I did most of it over Christmas. Do you and @FloEdelmann want to take a look and see if there's anything obvious missing or you might want changed for v2 of the API?

We can always do a v3 and onwards if you find stuff later.

[FloEdelmann]

Is there a way to get all the information of one fixture (RDM model), identified by RDM manufacturer ID and RDM model ID? That'd be the most useful API for us, I think.

For me, it's not that obvious given only the Python source code. Maybe a simple Markdown API documentation (listing all possible endpoints, the data they take, and the format of the result they return) would be useful for others as well?

[peternewman]

These two need cherry-picking to fix https://travis-ci.org/OpenLightingProject/rdm-app/jobs/377816384:
2739516
583051f