Minor Tier Change Update (Patreon)

I've added the $50 tier back after having taken it down for a while. However, for the time being I've limited it to one slot so I can continue to figure out how to balance the Patreon workload. I don't anticipate it will be filled for a while (if at all), but I'd like to announce that it's there, even if only in a limited fashion for the time being.