Modified Strategy Manager
- Updated StrategyManager with a new Zerg build order
Strategy Manager update:
- Test build order works (only drones)
Major changes to StrategyManager:
- Repalced fixed strategy (0) for Zerg with random index generator
- Moved available strategy vector builder to separate function
- Added two Zerg strategies
Merge branch 'feature/port_cerver_to_StrategyManager' into develop