Added icons:

• Abigail
  
• Marble
  
• Nightmare fuel
  
• Grass Gekko (temporary)

• Changed Mandrake icon

It works

Added priority system:

• Walls are low priority (placed behind everything)
  
• Gems are high priority

Added icons:

• Flowers
  
• Gears
  
• Gold Nuggets
  
• Gems

• Added Nightmare Fissures[dont-starve-game.wikia.com] icons
  

• Dragonfly icon is Off by default (people reported that he gets bugged)

• Fixed Rocky