Summary

This is a minor update.

Additions

• Natural resource -> ecosystem biomass interaction

Lumbermills can now cause deforestation.

• Environment factors affect output multiplier. Arctic farms are now prevented.
• Industry input satisfaction map filter

• Area extraction. Industries which has natural resources as input can now gather the, from adjacent tiles as well. This needs to be set in the .xml template.
• Added "big residence", "vast hunting grounds" and "lumbermill complex" industries. The later 2 uses area extraction. 

Bug fixes

• Resources could in specific circumstances become negative after the resource transportation (diffusion) step.