Forwarded constness of value type for SqpIterator + PB11 stuff Signed-off-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>

Added more PB11 wrapped classes for Spectrograms Signed-off-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>

Added QVector<double> PB11 wrapper this will help debug Many DataSeries related methods still returns QVector Signed-off-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>

[CPP utils] Added function alias macro Signed-off-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>

Added cpp_utils header to host cpp tricks Signed-off-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>

Added build interface for TestUtils TestUtils is now used in GUI unit tests so include path propagation is now needed. Signed-off-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>

[CMake] Small tweak on submodules detection Signed-off-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>

Updated meson build files Signed-off-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>

Made downloader thread safe, added debugging helper for DateTimeRange Signed-off-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>

Fixed bug range diff, the upper range was wrong, tstart and tstop were swapped Signed-off-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>