WIP: convert spells to attack + effect
WIP: convert spells to attack + effect

Attacks now kick off effects. Effects are stored as prototypes and new
processes are generated from those prototypes with effect handlers (as
opposed to effect prototype handlers).

Spells need to kick off effects.

At some point I need to add a test for kicking off multiple effects for
one attack (e.g. a spell that does blunt force and fire) as well as an
effect that is continuous (e.g. lighting someone on fire).

cwmaguire/erl_mud,cwmaguire/erl_mud,cwmaguire/erl_mud