Enable 2-way groundstation <=> spacestation sync

**Is your feature request related to a problem? Please describe.**
Right now, only the spacestation syncs down to the groundstation. It'd be nice if I could sync in both directions.

**Describe the solution you'd like**
Add another rsync cron job that syncs groundstation to spacestation and break up "trials" into "to-spacestation" and "from-spacestation" and "to-groundstation" and "from-groundstation"