Added food usage.
Removed ability active time.
Modified berserk ability.
Tweaked abilities.
Made stoneskin just absorb damage.
Rebalanced abilities.
Added ability points.
Changed "=[...]=" signs to "=...=".
Added ability caps.
Added fortitude attribute, renamed toughness and rebalanced.
Added energy and rebalanced.
Merge branch 'master' into rpg_improve