added new launch files for kinect1 skeleton tracking

[siehlema]

In order to solve Issue #64 four launch files have been added. They have been created in an analogue way as the Kinect2 launch files for skeleton tracking.

I obtained expected functionality.

But there still is an error showing:
[ERROR] [1566555953.455625168]: transform exception: Could not find a connection between 'world' and 'kinect1_head_rgb_optical_frame' because they are not part of the same tree.Tf has two or more unconnected trees.

So maybe some adjustments have to be made?

[bsubbaraman]

Hi @siehlema! Here are a couple of starting points if you haven't tried them already: you can run the command rosrun rqt_tf_tree rqt_tf_tree while the system is running; this will show the current tf tree and what connections are currently being made. Based on the error message, there will be (at least) two separate trees. You may start to resolve this issue by looking at detection_initializer.py, as this is where further static transform publishers are created.

[siehlema]

Thank you @bsubbaraman, you were right. I found out, that the object detection caused the error. The tf tree also shows that.

TF tree with object detection:

TF tree without object detection:

Is there something missing in the new detector_yolo_kinect1.launch?