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

Schrödter, Tobias authored 4 years ago and Schrödter, Tobias committed 4 years ago

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

- remove unused includes
- change deprecated includes
- change to system include when needed

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

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

- 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>

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