Add skeleton for MagicSpells support (not yet operable).
Set Bukkit dependency to 1.4.7-R1.0.
By default the player-class hook is disabled from now on.

It was mostly used for Citizens 1.
Add License.
Add SpoutCraftPlayer (and other random ones) ot player-class default
player classes.
Forgot to increment versions of changed hooks.
Deprecate ExemptionManager.