Fixed towing system
Tweaked Nebula Flow (a lot)
Extracted environment appearance settings into ZoneEnvironment data structure
Stardust particles now follow global flow field
Implemented hostility system - entities can mark each other as friend or foe depending on changing conditions (currently only depends on local security level)
Added "friendly" target indicators in blue
Added Main Menu scene
Tweaked world map to incorporate secondary colors in zone icons + glowing links
Entity Serialization is now generic
Zone Serialization now includes entities
Fixed bug where wormhole traversal would unbind from player entity
Game Manager no longer spawns entities (loadout file format changed)
Wrote extension to randomly select weighted items from collections (for generating enemies)
Minimap works again
Stardust density is now proportional to gravity depth
Generated zones are double the size and better distributed
Orbital hierarchy actually working now (!)
Station start position actually orbits something now
Max gravity strength remapped to infinity (zone boundary is properly impassable now)
