Snowy rivers

There are now rivers flowing through the land, and snow falling in the northern wastes.  At least, if you so desire.  I added rivers which come down from the mountain ranges and make their way to the coast.  They are not very efficiently generated at the moment, so the larger maps now take a bit longer to generate.

Temperature is now a factor in the world, and will affect the types of flora that will appear in an area.  So far just a few different kinds of trees, but more is planned.  I also created some snowy tiles for areas where the temperature has dropped below freezing.  The temperature slider lets you determine how warm or cold you would like your world to be.  I had to rig up a system to join the frozen and non frozen areas since Godot's terrain feature doesn't seem to like auto-joining multiple terrain types.

Next up:

• Still more noise variety and some special features affected by them.  Mana, alignment, spirit, etc.  
• I should probably look into making some kind of little character to walk around with, rather than the default Godot icon.

Eventually:

• Lighting/fog of war.  Let people actually explore a little.
• Hex based movement.

Thanks again.