Known issues for ROS Noetic version of the framework

[tlind]

I will soon push a branch with ROS Noetic support. However, the following issues must be resolved later on because they depend on other upstream modules that do not yet fully support ROS Noetic / Ubuntu 20.04:

• There is no cudagl Docker image yet released by Nvidia for Ubuntu 20.04 (it seems they have the CUDA part ready, but not the GL part). Thus, the noetic-gpu Docker image cannot be built. Check back here if 20.04 images pop up.
• Therefore, I have not yet been able to test the demo bagfile in rviz.
• Due to a bug in compressed_depth_image_transport (Demo on provided bagfile is currently broken in ROS Noetic (unsupported image format) #79), the depth images from the demo bagfile cannot be uncompressed and therefore the upper-body and PCL detector will not work on such bagfiles.
• Package jsk_rviz_plugins is not yet released for Noetic, because they in turn are waiting for other upstream packages. See Noetic release jsk-ros-pkg/jsk_visualization#772. Thus this dependency will be uncommented in spencer_people_tracking_launch/package.xml. rviz will show some warning messages for existing rviz configs (e.g. demo bagfile).
• Rviz will show a warning message about an outdated animated mesh. I have not yet been able to convert the skeleton and the mesh jointly using the OgreMeshUpgrader to the latest format, because it always fails to find the associated skeleton file. I tried both ogre-1.8-tools and ogre-1.9-tools.