Adding compression to rsync commands

This speeds up transfers significantly. No reason not to include it as far as I know.

plugins/rsync/rsync.plugin.zsh

-alias rsync-copy="rsync -av --progress -h"
-alias rsync-move="rsync -av --progress -h --remove-source-files"
-alias rsync-update="rsync -avu --progress -h"
-alias rsync-synchronize="rsync -avu --delete --progress -h"
+alias rsync-copy="rsync -avz --progress -h"
+alias rsync-move="rsync -avz --progress -h --remove-source-files"
+alias rsync-update="rsync -avzu --progress -h"
+alias rsync-synchronize="rsync -avzu --delete --progress -h"