Plutonium Energy 1.7.3

Major Changes:

• Added alternative recipes and technologies for making dission reqctor equipment.
  It can be made from 1 Plutonium fuel cell or 10 MOX fuel cells.

Balancing:

• Reworked plutonium fuel:
  In the recipe, nuclear fuel was replaced by rocket fuel
  Fuel value was raied to 3GJ
  Vehicle acceleration bonus was raised to +200% and top speed is +25%

Minor changes:

• Internal terminology swap
• Finished swapping of the terms "used-up" to "depleted"
• Updated reactor remnants graphics
• Removed unused "medium" resolution sprites

Fixes:

• Assigned appropriate weights to ammo items
• Assigned appropriate inventory sound effects to items
• Adjusted grouping and ordering of items and recipes
• Added reactor circuit network connections to MOX and breeder reactors