Correct EntityManager::getComponentTable() not to give Entities with paused Components.
Add the Assertion system and use it ti check the dynCast<> of PhysicEngine and Ball
Add mass_ to ecs::Mass and invMass_ to ecs::Solid.
Add a fourth parameter to Ball and to ecs::createBall() with pre-condition
Add the possibility to make balls more heaby or more light in Application