enabled overwrite and fixed input check typo

added GRASS/Python implementation of terrain noise calculation

simplified code by using 'a' flag for r.neighbors (improves 3abda63)

reorganized AML terrain scripts to reduce superficial redundancy

renamed script to multiscalesmooth.R

numerous comment, format, and variable name changes

now actually refining before smoothing (GRASS version)

reversed order of refine-and-smooth step

added GRASS/Python implementation of multiscale smoother

added R script to run multiscalesmooth example on Oregon SRTM

switched to more accurate chisq test

enhanced smoother to accept sd as a raster, not just a constant

tweaked var names to match Gallant pub; added comments

fixed vwg step

continued R translation of multiscale smoother

initial R translation of multiscale smoother

added old Oregon topo AML scripts (Tien Ming Lee, John Gallant)

finished organisms->layers content migration

folded Nunokawa backup file changes into vrt script file

cleaned up file permissions

added in various previously uncommitted scripts

reorganized terrain-related files