Use newest bukkit version.
First 1.6.1 commit, still errors though.
All errors should be gone now.

If you want to use this in the current status keep in mind that this is
not tested AT ALL.
Updated desires and added missing thigs.

Added new one: DesireTameByRiding.
Added new features: riding and tamed riding.
Added horse entity.
Updated serialization.

This includes the ability to serialize features, being able to
serialize an inventory, slightly better backwards compatibility and
small other changes. Some things have also been renamed because they
were spelled wrong.
Merge pull request #49 from kumpelblase2/mc1.6.1

Update for MC1.6.1