Added a direction finding algorithm for target, get_dir_to(). Mostly useful for positioning sprites in relation to a target. Such as energy beams, lines, and so on.
Changes to ninjas. Fixed a bunch of bugs and finished content. It is now possible to drag people with you when phase jaunting/shifting. Jaunting/shifting should also kill livestock, huggers, and damage mechs.
Renamed /obj/spell path to obj/proc_holder/spell in order to have a generic proc_holder category. For now it only works for the AI but can be expanded to other mobs.
git-svn-id: http://tgstation13.googlecode.com/svn/trunk@1566 316c924e-a436-60f5-8080-3fe189b3f50e
Added trigger spell, which basically activates two or more spells at once. Used that to fix fireball and blind to what they were pre-change (not code-wise, but the same for the end user).
Projectiles aren't limited to default spells now.
All spells now use a user argument (=usr by default) instead of usr.
git-svn-id: http://tgstation13.googlecode.com/svn/trunk@1474 316c924e-a436-60f5-8080-3fe189b3f50e
