SequencesLoader: fix compilation warnings

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
Surveyor: verify buffer size before getting producer

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
Surveyor: add a variable to store the period

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
Surveyor: run in actor-model-only mode

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
spawn actors with spawn instead of spawnActor

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
Documentation: add some documentation for Surveyor

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>