WIP: Make this a CMake-Package

[skasperski]

Hi,

in order to use this package outside of ROS, I started transition towards a plain CMake-Package. Usually this works fine, as Catkin can handle CMake-Packages seemlessly, at least with ROS1. I assume it should work with ROS2 in a similar fashion, but needs testing. I few changes will also be required for dependent packages, I only did it for hdl_localization so far. I changed the package-name to "pclomp", because that is what was used in the headers.

Please let me know if you are generally interested in following up with this approach.

[koide3]

Thanks for your proposal. I would like to avoid directly merging these modifications because we need to test compatibility with several other packages, but building in non-ROS (or ROS2) environments is a very commonly demanded feature, and thus I would like to mention your repo in README so that users can easily find the information on non-ROS situations.

[skasperski]

I absolutely agree, in its current state it should not be merged. I wanted to ask first, before putting more effort into this. Maybe you could test it in a ROS2 context and put the result here.

For reference: Here is the adapted version of hdl_localization. The required changes there are small: skasperski/hdl_localization@258d9ff

[koide3]

Sorry for the late reply. If it doesn't change the project name and namespaces, I would be happy to merge it.
Because there are some third parties using this package, I would like to keep the current interface.