Pocket Edition v0.3.2 alpha

v0.3.2 alpha added furnaces, gold, iron and diamond materials, as well as made other changes and fixes.

Additions

 * Furnaces
 * Every available block and item can now be gathered, crafted or smelted into (no more unlimited items).
 * Saplings
 * Glass panes
 * Oak wood, brick and cobblestone slabs
 * Gold ingots
 * Gold ore
 * Iron ingots
 * Diamonds
 * Diamond ore
 * Diamond, gold and iron pickaxes, shovels, axes and swords.

Fixes
4 bugs fixed
 * Less flickering/Z-fighting on some devices.
 * Having one of an item or block no longer displays the "1".
 * Mobs have correct health.
 * Fixed rendering of fence gate and half block in hand.