CHG: Refactoring of Modifiers.
CHG: Modifiers abstraction changed. Added more abstraction.
CHG: GameObject and StrategyObject classes defined.
FIX: speed, points and health become calculated fields that based on attached to GameObject modifiers.
CHG: points self-clean itself after apply
Merge branch 'master' of https://github.com/OleksandrKucherenko/spacefish