interactivemarkers: get the correct transformation for sub-markers

[T045T]

tested with http://www.cse.wustl.edu/~dvl1/stuff/marker_marker_marker_frame_bug.zip - submarker now shows up where you'd expect it to
also made sure examples/interactivemarkers.html still works

RE: #71 - ros3djs now mirrors RViz, but it's unclear if thats ultimately the desired behavior

[DLu]

This version doesn't seem to work on a more complex example. I'm working on narrowing in to find the exact cause now.

[DLu]

In the above example, rviz shows the marker at 1m when the IM header is /up or /world.

Using the standard version of ros3djs, it appears at 0m and 1m for /world and /up respectively.

With this version of ros3djs, it appears at 1m and 2m for /world and /up respectively.

[T045T]

updated the pull request - together with RobotWebTools/tf2_web_republisher#14, I believe it works correctly now.

[DLu]

Works for me in both the toy example and my more complex example. Thanks for the fix!

[DLu]

Any reason not to merge this?

[rctoris]

I haven't had time to test this yet, if you can confirm https://github.com/RobotWebTools/ros3djs/blob/develop/examples/interactivemarkers.html works as expected I can go ahead and merge!