Terrain usage studies
Add basic building models
Add building prefabs
Add MapManager & selection mechanism
Add MapData class & Rewrite SetupMap()
Add information window for civil houses
Add information window for towers
Add information window for buying towers
Add blueGhost, redGhost modes in BuildingSelection.js
Add information window for adjusting tower direction
Add HP Bar for towers
Fix 'HP bar not update when tower upgrade' issue
Ready for refactoring
GITD prototype phase I