feature request: regrowth of forests.

[emscape]

maybe it would be an nice Idea to make (slow) regrowth of forests available on places outside the walking paths? When forests are still there, they slowly (or vastly if u'd like that) grow new trees. I suggest that you just make the standard tree model have a growing size multiplier, and growing amount of recourses. At the border of forests there will be new trees growing then. Maybe this would add some variation to the gameplay.