Make higher tier farming recipes require higher tier farms

[KiwiHawk]

• Swap the environment techs and the T2 Farming techs
  • bio-desert-farming-2 <-> bio-desert-farm
  • bio-swamp-farming-2 <-> bio-swamp-farm
  • bio-temperate-farming-2 <-> bio-temperate-farm
• Make the T2 farming recipes require T2 Farm
  • advanced-desert-farming
  • desert-4
  • desert-5
  • advanced-swamp-farming
  • swamp-4
  • swamp-5
  • advanced-temperate-farming
  • temperate-4
  • temperate-5

Restore alien farming as a prerequisite for the farm environment techs.

[KiwiHawk]