Added MPL license headers
SectorRenderer renders entities in sector, manages particle systems for ship thrusters
Thrusters apply torque based on orientation and position relative to ship center of mass
GameManager controls the player ship's thrusters
Player can dock with station if they are near
Implemented task and control module for surveying resources
Implemented behavior for resource scanner
Resources aren't shown until they have been surveyed
Entities can now display messages, used to provide drone state feedback
Orbital entities now provide correct velocity, improving drone docking precision
