Charge up front (Patreon)

I've finally got this feature! God damn there was so many cases of theft from my Patreon and it'll be solved for good.

I'll enable this feature tomorrow or on Sunday to avoid any issues with current billing cycle.

All current patrons will experience no change at all, don't worry.

This feature came just in time cuz I've been thinking about revamping my current way of posting on Patreon. With "charge up front" I won't need to change anything for now.