Deploying takes too long

[jkuszmaul]

Possible things to change:

• Incremental copy (only scp things that have changed)
• More compression (currently just whatever zip does by default)

[jsburklund]

If Rsync is used to transfer only files that have changed, the --checksum or --ignore-times option may need to be set, since the time on the BBB may not match the real world time. See https://serverfault.com/questions/211005/rsync-difference-between-checksum-and-ignore-times-options