Bump NPCFactory and CraftBukkit versions, add disc

laimer.
Upstream merge

"setInvulnerable" was renamed to "setGodmode" in https://github.com/lenis0012/NPCFactory/commit/bea35f09ba399c120f8da322b8180259023cb5ee.

Bankers shouldn't be killed, this commit makes them to be invulnerable.
Merge pull request #4 from MinePod/1.8-protocol-compatibility

1.8 protocol compatibility