Alpha 0.4.0

Update 0.4.0. added chests, beds, creepers, food, TNT, and Peaceful difficulty to Minecraft PE. The additions and changes are:
 * Chests (could only make single chests at the moment)
 * Beds to skip the night and set a spawn point (the place where the player respawns after death)
 * TNT
 * Flint and Steel (only used to ignite TNT and could only be obtained in Creative using inventory editing)
 * Creepers
 * Food (apples, bread, mushroom stew, etc.)
 * New crafting recipes for wool and stone bricks
 * Peaceful Mode where the player auto-regens health like in older versions of Minecraft PE and monsters don't spawn in dark places
 * Farming
 * Wheat
 * Seeds
 * Hoes
 * Added Moss Stone, Redstone Ore, White Wool, and Trapdoors to Creative Mode
 * Red dye could be obtained by smelting red mushrooms, and Yellow Dye from dandelions
 * The day was made longer, and zombies now dropped feathers
 * Snowballs could be thrown, and animal spawning was just being worked on.