Quick tweak to nebulas for the Huge scenario.

Updated for 2.3

- Tweaked the galaxy scenarios and added a new 5000 star map since the game can now handle them (64-bit update). Be prepared for an obscenely long load time if you choose 5000 stars. Takes about 20 minutes to load on an 8700k.

Changes:

• No Clustered Starts mod is now fully integrated. Be sure to set "Empire Placement" to "Clusters".
  
  
• Hyperdrive Modulation tech requirements changed.
  
  • Windup and winddown buffs removed. Hyperspace travel speed buff increased from 20% to 30% per level (150% max).
    
  • Each level now requires the equivalent tier in Hyperdrive, Power Plant, and Sensor tech (for example, Hyperdrive Modulation IV requires Jump Drive, Antimatter Power Plants, and Sensors 4).
• Hyperdrives nerfed. HD 2 and 3 no longer have hyperspace speed bonuses. JD and PD winddown time increased to 30/15 days up from 25/12.5 days respectively. JD and PD hyperspace buff reduced from +200%/+300% to +50%/+100% respectively.

Changed "enable_default_design" to "no" for the Hyperspace Conduit. It was causing advanced empires on higher difficulties to spawn with a lot of them. The AI also isn't smart enough to use them correctly.

You'll need to manually add the design whenever you start a new game.

Also I can't seem to get the AI to build the starbase building, no matter how high I push the ai_weight. If anyone knows a solution, let me know.

Updated and re-uploaded for 2.2.