Simple Covers

Version 0.2 changed a lot of internal stuff and storage format. If you earlier alpha builds in a world you care about:

• Backup your stuff before updating!
• Microblocks placed in the world should convert to new format 
• Microblock items will need to be manually converted to new format by placing in a crafting grid
• Old microblock items will have a special icon and text, and can't be placed until converted
• The upgrade system will be removed at some point in the future - make sure to visit all chunks where microblocks were placed, and convert all items now.