* Add a new translation unit which includes all interface headers
* Adds an entry to the compilation for clang tooling
* Ensures that all headers compile successfully
* Remove superfluous globbing

Signed-off-by: Martin Stump <martin.stump@mercedes-benz.com>

* Move "doc", "include" and "test" to the root dir
* Rename to MantleAPI

Signed-off-by: Martin Stump <martin.stump@mercedes-benz.com>

* Add CPM download script
* Download nholthaus/units@2.3.3
* Download google/googletest@1.12.1
* Add doc target
* Add test target
* Skip unused units

Signed-off-by: Martin Stump <martin.stump@mercedes-benz.com>