Don't modify the radius of construction spells based on wand power.

Seemed like a cool idea, but, no- I don't think so.
Remove ghasts, lavaslimes and enderman from the Mob and Monster Spell

TODO: Configurable randomization
Forgot to add clearcache to plugin.yml for permissions.
Some spell tweaks.
Skip checking player data if it's more than 2 days old.

This is configurable.
Some work on making the "cast" command usable without a player.
Just completely disable the Light spell for now.
Add "count" parameter to grenade spell.
Add "Cluster Bomb" spell.
Add default "name" and "description" nodes back to wands and spells for easy customization.