The Spellblaze Crystal has more mana regen

Demon Plane spell now correctly ends if one of the actors dies instantly upon arrival
Demon Plane spell damage is now bound to the caster's damge increases


git-svn-id: http://svn.net-core.org/repos/t-engine4@3148 51575b47-30f0-44d4-a5cc-537603b46e54