v2.3.0

• Adds new symbols to support the Yellowstone Live road status map (Construction, Incident)
• Adds new Aquatic Invasive Species Decontamination Station symbol
• Revises the spring symbol; old design looked like a road leading into a tunnel
• Revises existing Builder symbols by eliminating useless drop shadows and making each pixel-perfect for the first time
• Revises existing "standalone" symbols by eliminating drop shadows, making symbols much easier to maintain and augment in the future