Variable-wise scaling and offset corrections

auto - Autoscales matrix to mean zero unit variance.   [demo]
mncn - Scale matrix to mean zero.   [demo]
medcn - Median center scales matrix to median zero.
scale - Scales data using specified means and std. devs.   [demo]
gscale - Group/block scaling for a single or multiple blocks.   [demo]
gscaler - Applies group/block scaling to submatrices of a single matrix.   [demo]