What's new in 0.5.4

+ Special world types: sky islands and evil wasteland. In the evil wasteland monsters spawn in daytime as well as at night + Added descriptions for world anchor, metal axle, and metal gearbox * Fixed structures that weren't spawning properly * Adjusted breaking time and blast resistance values for a bunch of blocks * Clay now also spawns underground between Y 20 and 80 (this doesn't affect chunks that have already been saved to disk) * Using fertilizer on a grass covered block can now spawn a wider variety of plants regardless of the current biome (including crops, flowers, clover, hemlock, poison bush, and red mushroom). Reeds and small cacti still only spawn that way in swamps and deserts respectivelly (as well as in special worlds). Saplings only spawn that way in special worlds. * Mini map centers on the player every time it's opened * Fixed a crash with mobs falling into the void * Other minor changes and fixes