fixed retaliation & hpemde aggro

retaliation still needs a little work, but is 90% functional
hpemdes now aggro but do not attack unless damage is done to them
Is there a mob other than Hmphede  that exhibits this behavior? If so, then the m_behaviour would be the best solution. Otherwise I can't think of another mob in FF pre ToAU that does this. Simplifies the action and specifically leaves debugging easy for the project. Again still new to contributing, but it makes sense.