add progress indicator

Resolves-bug: https://github.com/sebhtml/Ray-Cloud-Browser/issues/35
Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>
group disk operations for create-map command

Resolves-bug: https://github.com/sebhtml/Ray-Cloud-Browser/issues/34
Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>