MarkerClient: Subscribe to MarkerArray topic

[T045T]

Fixes #73

[rctoris]

Would it make more sense for this to live in its own object type? e.g., MarkerArrayClient. Currently, this will subscribe to both a marker and marker array topic on the same client, when one or the other might not even exist.

[T045T]

It would be simple enough to make a MarkerArrayClient, but the RViz Marker Plugin also subscribes to both the regular and the _array topic, so I think it's what users would expect.
Is there any major downside to subscribing to an unpublished topic?

[rctoris]

Hmmmm, looks like it does both. rviz also has a MarkerArray display type. I think the usecase is if the name does not conform to *_array which is not necessary.

[T045T]

Good point :)

I've moved the functionality into MarkerArrayClient, leaving your name in the author tag because it's mostly copy&paste from MarkerClient, hope that's okay with you.

[rctoris]

Looks good! 🍰

[DLu]

Thanks @T045T !

[DLu]

Should this line be
ROS3D.MarkerArrayClient.prototype.__proto__ = EventEmitter2.prototype;
?

I'm currently getting
Uncaught TypeError: Cannot read property 'prototype' of undefined
on this line.

[T045T]

Yes, of course. It's fixed now, sorry about that.