Added heroism set and buffs, fixed robe_jedi_dark

Added rest of heroism set and associated buffs, robe_jedi_dark now
properly deduct its effect, added buffs for heroism set bonuses.

Still needs an check for piece count

Credit for code Wefi.
Merge pull request #41 from Idart2/master

Added heroism set and buffs, fixed robe_jedi_dark