Nature plug-in update. Minor update of the Land ability.
1.) Bug fix (ZabagedTin) - missing *.area or *.obj file no longer causes crash of the application.
2.) ElevationLegend now loads colour as 3 RGB values which lie in the [0, 255] interval (previously [0.0, 1.0]).
3.) <TerrainBlocks> element renamed to <LandBlocks>.
4.) <Wireframe> element renamed to <UseWireframe>.