Find optimal rsync options

[zenlord]

Currently, the default options are:

RSYNC_OPTS=("-azx" "--max-size=15m" "--include='*/'" "--exclude-from=/usr/local/bin/vagabond.excludes" "--human-readable")

But the "--delete" option is required as well to have an exact copy on the remote server and local client. However, the excludes-file in combination with the --delete option seemed to cause files to be deleted after 1 pull and 1 push-action. Before re-enabling the --delete option, more testing is needed.