Move new core devs to the "Core Developpers" section of mainmenu.
Raise the maximum node limit to 0x7fff

As agreed to by kahrl
Made unknown nodes stop falling nodes properly and shorten lines
Add a callback: minetest.register_on_craft(itemstack, player,
old_craft_grid, craft_inv) and
minetest.register_craft_predict(itemstack, player, old_craft_grid,
craft_inv)
Fixed ignoring of "diggable" property of nodes.
Don't remove background of games in submenus
Add more checks to vector functions
Add my email address to the main menu credits