MCPainter

Updated to spigot 1.13 and minecraft 1.13 assets. Plugin can work optionally with: * BlocksHub 3.x+ - to log block changes and control block change access * WorldEdit 7.x+ - to edit the world (undo/redo features) Other changes: * built in undo command (only 1 level) if you are not using WorldEdit * reuse item frames and maps when doing the HD Image command WARNING: I would like to point out that the block definition file for 1.13 was only updated to support the new asset files. Therefore block render from material in hand might not work. This will be replaced in next version with blocks loaded from assets (resource packs).