Add support for more orbs around nodes

[grtjn]

Orbs on the nodes should be allowed on at least NE (North-East), NW, SE, SW. Maybe also on N, S, W, E. They should be data-driven, not hard-coded.

[grtjn]

Maybe something like:

var nodes = [{
    group: 'some group',
    id: 'some id',
    label: 'some label',
    orbs: {
        NE: {
            label: 'NE label!'
        },
        ...
    }
}]

[grtjn]

note: edgeCount and linkCount are too specific. It should be much more generic, and allow showing number, character, (small) image, or font-icon.

[patrickmcelwee]

I like where this is going. Maybe we could maintain support for something like linkCount/edgeCount as a convenience for the simple case, and we translate it into the appropriate orb.

[grtjn]

Yes, legacy support will be easy..