Dazzle revamp, part of CC changes.

This pull request looks at balancing Dazzle, which currently lasts up to 15 seconds and is not reduced by the same random calculation as the other CC spells. Currently, 1-8 seconds of duration come from spellpower, and 1-10 from karma difference between attacker and victim, and the result is bound between 3-15 seconds.

My version has the total bound between 3-8 seconds, with 0.4-1.0 seconds coming from the attacker's karma, 3 seconds base time and up to 4 seconds from spellpower. The final duration is subject to a 10% randomness, so with 99 spellpower and 100 karma, the attacker could count on a dazzle between 7.2 and 8 seconds (before mitigating factors such as EE, dement, AmA). The pain effect after dazzle wears off is reduced from 8 seconds to 1 second.

As with the blind pull request, I've started the duration off slightly higher than stated in the forum thread, and we can balance down from there if necessary.