Ships are now more visible in lit areas (depending on cross section stat in Reflector behavior)
Refactored all behaviors to remove context & entity references (can get them from equipped item reference if needed)
Fixed crash when enemy dies of heatstroke while targeted
Exponential decay for visibility now uses correct time-independent formula
Refactored item inspection in properties panel (now consistent between equipped items vs. inventory and store items, shows effect of heat on stats)
Reordered item properties and added spacing between groups
Copied Main Menu to gameplay scene
Added Pause functionality (ESC key)
Save & Restore discovered zones
Applied vertical offset to asteroids (no more intersections!)
Nebula shader optimized to improve early exit
Nebula shader outputs light scattering to second render target
Modified depth of field shader to use nebula light scattering
