Floating water rendering bug fix
- Sends the item in hand packet when spawning Human entities
Minor performance improvements for flat generator

Signed-off-by: Irmo van den Berge <bergerkiller@gmail.com>
Added hotbar scrolling.

Signed-off-by: aPunch <theapunch@yahoo.com>
Merge pull request #463 from aPunch/master

Hotbar Scrolling
Properly close furnaces
Send furnace progress bar and fire icon indicators sooner
Part of potions.