DXX-Retro 1.4X6

This is the most recent experimental release of DXX-Retro, version 1.4X6.

Change log:

• Coop
  • Don't respawn robots in coop.
• Demos
  • Fix rewind bug where rewinding through a frame with multiple damage sources would show damage and energy incorrectly.
• Mac
  • Switch from XCode to scons for building. Note: message box tech is disabled for now, crashes will only display to the terminal or the log. To see them, run Descent from Terminal using the command ./d1x-retro-1.4.X6.app/Contents/MacOS/d1x-rebirth
• Observer
  • Don't lock to player 1's view while observing in coop.
  • Observers no longer disconnected when other observers connect or disconnect.
  • Observers no longer see themselves connect as an unpatched client when someone else connects to the game.
  • Observers will now be properly told that they can't observe a game that hasn't yet started.
  • You can now observe players directly in first and third person view. Use Ctrl+1 through Ctrl+8 to observe players 1 through 8. Use Ctrl+9 and Ctrol+0 to cycle back and forth through the connected players and free observing. Use Ctrl+- for first person view and Ctrl+= for third person view.
  • Added the above options to the multiplayer F1 help menu, and streamlined the menu to only display relevent commands.
  • Documented the /noobs command (kick all observers) in the F1 help menu.
  • Shields and shield changes are now visible to observers.