- Stop Tracker inheriting from QVector, instead save TrackPerson in std::vector
- Save TrackPerson's in another class (new class PersonStorage)
- Move all functions directly accessing the trajectories in a writing/editing manner into this class
- Some small refactorings and documentation-comments

Signed-off-by: schroedtert <t.schroedter@fz-juelich.de>

Signed-off-by: schroedtert <t.schroedter@fz-juelich.de>

- Add clang-format file
- Add scripts and format check for CI
    - script for checking the format (bash)
    - script for formatting the code (bash)
- Add format checking to CI
- Reformat project with clang-format

- Loading a C3D-File from XSens into an internal tree structure
- Transforming the internal skeleton into lines and arrows to be drawn
- Actual drawing
- Settings for the visualisation (turning it on/off, changing thickness or color)
- Saving the path to the C3D and other metadata in the project file
- Loading the data from the project file

- resolve existing and new warnings on MSVC

Storing the extrinsic calibration in the .pet file - version bump because of changed .pet-file format; Should be backwards compatible.

Signed-off-by: schroedtert <t.schroedter@fz-juelich.de>

feat: Adds a custom MessageBox which does not break PeTrack when running with -platform offscreen (mostly CI)

Resolve "Custom MessageBox with logging capabilities and offscreen/scripting support"

Replaced QMessageBox with QDialog to get the correct layout without the instable hack to widen it.

- changed LICENSE to match GPLv3
- add license header to project source files
- add note to license to ReadMe.md

Signed-off-by: t.schroedter <t.schroedter@fz-juelich.de>

Signed-off-by: Schrödter, Tobias <t.schroedter@fz-juelich.de>

supported from now on
By accident, also enabling background substraction code, that should be
enabled, but was disabled due to CV_MAJOR_VERSION == 3 Macro

Ref #1