tag for SET_CUSTOMERS

Link: https://github.com/GeneAssembly/biosal/issues/220
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
controller speaks to customers, not stores

Link: https://github.com/GeneAssembly/biosal/issues/221
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add map structure

Link: https://github.com/GeneAssembly/biosal/issues/218
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
simplify map implementation

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
add set structure

Link: https://github.com/GeneAssembly/biosal/issues/219
Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>
there is a bug, value size can not be 0 or 1 or 2 or 3 (?)

Signed-off-by: Sébastien Boisvert <boisvert@anl.gov>