Also stringify the note id (because existing notes from OSM are this way)
Also make sure comments is initialized as an Array not an Object
Also clarify some of the tests
This makes the osmNote work a bit more like other osm objects in iD.
- When working with the osm objects, we'll treat them as immutable.
So all modifications will be through the update method:
e.g. can do this in a repl, like chrome devtools console:
> n = iD.osmNote()
osmNote { id: -1 }
> n = n.update({ foo: 'bar' });
osmNote { foo: "bar", id: -1, v: 1 }
- none of the other osm objects have getters, and in JavaScript all the
properties are public anyway
