Update to up-front payment (Patreon)

Howdy folks! We've just updated our page to require up-front payments for new Patrons. This won't change anything for existing Patrons, but future Patrons will now be charged for the month they join up-front.

In other news, the v0.3 update will be released in only a few days! We're very excited about it too :)

Again, thanks for your support!