Added initial inventory event support for modded containers.

A compatible bukkit view will now be created for any forge container with
inventory when it is accessed. Any mod TileEntity that implements
IInventory will also be added to Bukkit's InventoryType enum. These changes
*should* allow modded containers to fire the following events :

InventoryClickEvent
InventoryDragEvent
InventoryOpenEvent
InventoryCloseEvent