Added new config values: now you can disable public domain feature and configure number of maximum players in canvas lore
added "public domain" feature for canvas +crafter can craft these canvases; added translation to ukranian
Fixed regex for adding authors (allowing "_") +Now you can add/remove authors ignoring case, preventing duplicate nicknames, and allowing removal in any case (but canvas copying remains case-sensitive)
update for Polydecorations 0.4.4
Fixed empty canvas not crafting
