* 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>

The  method ICoordconverter::Convert is ambiguous, as the returned
position is defined as a variant. Also, one inert_pos could lead to
several openDRIVE positions (overlapping lanes). To clarify, the method
has been removed.

Signed-off-by: Rene Paris <rene.paris@in-tech.com>

Closes #15

- Bundle `RouteStrategy` together with `Waypoints` into new structure
  `RouteWaypoint`
- Using `std::vector<RouteWaypoint>` in `FollorRouteControlStrategy` for
  enhanced waypoints, allowing to specify a `RouteStrategy` for every
  single waypoint.

Signed-off-by: Rene Paris <rene.paris@in-tech.com>

**FIXUP THIS COMMIT BEFORE MERGE**

Till now it was is open how a simulator should plan a route for given
waypoints. This behavior is fixed by introducing a RouteStrategy,
following the specification of OpenSCENARIO 1.2.

Closes #14

Signed-off-by: Rene Paris <rene.paris@in-tech.com>

- entity position is the geometric center of the bounding box
- add geometry helper so geometric calculations can be done by the
scenario engines

- use IsEqual in stead of == comparison of double

Signed-off-by: Andreas Rauschert <andreas.rb.rauschert@bmw.de>

- added nullptr check for entity
- first try to use the existing velocity vector of the entity to derive
the direction of the future velocity vector before using the entity
orientation

Signed-off-by: Andreas Rauschert <andreas.rb.rauschert@bmw.de>

Signed-off-by: Andreas Rauschert <andreas.rb.rauschert@bmw.de>

Signed-off-by: Andreas Rauschert <andreas.rb.rauschert@bmw.de>

Signed-off-by: Andreas Rauschert <andreas.rb.rauschert@bmw.de>

- using the namespace "units" globally creates a name clash of
units::inverse with the glm library's glm::inverse, which is used within
the glm library. glm lib doesn't compile anymore then
- moved "using namespace units;" to mantle_api namespace for now

Signed-off-by: Andreas Rauschert <andreas.rb.rauschert@bmw.de>

Signed-off-by: Andreas Rauschert <andreas.rb.rauschert@bmw.de>

Signed-off-by: Andreas Rauschert <andreas.rb.rauschert@bmw.de>

- time conversion didn't compile when used
- Added units for spline sections

Signed-off-by: Andreas Rauschert <andreas.rb.rauschert@bmw.de>