Add New Deploy Modules Flag that will deploy only New or Modifed Files

[garyrusso]

Add a new flag to the deploy modules command. The new flag will only copy the new or modifed files. The logic would need to compare the last modified datetime timestamp of the destination files to the source files. If the timestamp of the source file is greater then the file is deployed. Logic would need to use UTC time for the comparisons.

[dmcassel]

Good concept, though I think this might lead to problems when used with non-local environments on project with more than one developer (a common scenario). Probably need to track the last deploy time on the filesystem (deploy/last-deploy). That file ought to stay out of git. If the last deploy time were tracked in the modules database, then we'd run into trouble if I deployed and then you did to the same environment.

[sjcrook]

+1

[grtjn]

Resolved in #551 + #777