Surveyor: give control to StoreKeeper actors for merging

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

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

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

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

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