CMake [meta issue]

[moriarty]

This is a meta issue to group all CMake / Catkin / Colcon etc related issues

Pull requests:

• Remove Catkin dependency while keeping CMake's find_package() feature #133
• Port to ROS 2 #209
• Install target generates a clean CMake package (+ Catkin dependency is now optional)  #215
• Downstream packaging patchset #231

Issues:

• Removing catkin as a required dependency #135
• Port to ROS2 #204
• catkin suggested deletion #280

There are more issues which could likely be closed out after porting to pure CMake, for example:

• make failed #173
• ImportError: No module named catkin.environment_cache #175
• OSX Install Issue #255

Creating this issue to keep track of the existing work and open PRs, not all have labels

[moriarty]

The minimal viable CMake version of this was linked to from this comment #209 (comment) here cottsay@4d5be00