Show fall particles while in creative mode. Fixes BUKKIT-5009

Remove craftbukkit diff previously required to patch vanilla
bug with fall damage.
Alter fall particle handling to respect visibility API.  Fixes BUKKIT-5106

Bukkits Visibility API should prevent players from seeing fall particles
of players that they cannot see.  This commit alters the handling to
provide an EntityPlayer argument that is later used to determine if they
are visible.