Update regarding sketch tiers (Patreon)

I'm going to delete the old tiers in a few days to avoid double charging next month, and post the updated ones on the 1st of next month.
I can't move people from one tier to a different one or change prices while there are people pledged to one, so you will have to change tier manually if you want to keep the benefits

Also new prices:         €12 -> €10 (single sketch)

                                 €22 -> €19 (double sketch)