Blickfeld-scanner

Changed
* CI: Update outdated auto-generated protocol documentation

Added
* Mockup-server, which can simulate a Blickfeld scanner by reading a point cloud recording. The implementation is currently **incomplete**, please read the documentation in the source code and the C++ server example.

Changed
* Protocol: Improved documentation of algorithms
* Python: Extended set_default_point_cloud_algorithms with static transformation

Changed
* Replace c++17 with c++14 call and added test to check compatibility
* Bugfix: Builds without Python failed with missing target dependency
* Enforce protobuf version 3

Added
* [Introduced in firmware v1.18] Algorithm API with three on-device processing algorithms: Background subtraction, neighbour noise filter, and static transformation.
* [Introduced in firmware v1.18] Option to disable the noise filter in the scan pattern configuration

Added
* Python: Structured numpy interface flag is now available for file streams

Changed
* Bugfix: Do not enforce the legacy serial number for hardware modules
* API: Rename filter `points_with_no_returns` to `delete_points_without_returns`

Added
* [Introduced in firmware v1.17] API: Introduce packed frame format. The format returns point clouds as flat binary structures. These can be efficiently encoded & decoded, which increases the performance on low-performance clients significantly.
* Python: Add structured numpy interface for point clouds
* [Introduced in firmware v1.17] Extended hello message with library, firmware, and hardware information. Added requests for serial number & product variant.