Updated ijkgrid.txx.
Changed ComputeCoord to ComputeScaledCoord.
Changed ComputeCubeCenterCoord to ComputeCubeCenterScaledCoord()
in compute_linf_dist.
Adjusted is_dist_le to accomodate change in spacing.
Adjusted for non-uniform spacing.
Merge branch 'master' of github.com:rafewenger/sharpiso