Fix reported Bukkit API version

Whoops, yet another missed diff in 1.5 update, slipped through the cracks
Add BlockHopper from mc-dev for diff visibility.

Remapped by Srg2Source from Bukkit/CraftBukkit@d11804edfdeaab2861f77e59504f9e40c4b3e35e
Limit hopper to valid directions. Fixes BUKKIT-3940

Remapped by Srg2Source from Bukkit/CraftBukkit@317e6b6e2bd5a025e8347d2405df8bae50a3413c
Update to Forge 7.7.1.624