Remove unnecessary code from all requirements.

Signed-off-by: Staartvin <mijnleraar@msn.com>
Show damage value when not obvious.

Bukkit doesn't have seperate names for all potions or wools, so when the
potion damage value is not shown, people cannot know what potion they
should get. We now show the damage value (if needed) so that people know
what kind of item it is.

Signed-off-by: Staartvin <mijnleraar@msn.com>