Feature request for pheatmap and/or plot.CompassResult

[demorrisfhcrc]

Can the heatmaps have the option of having whitespace between cytokine profile groups (e.g. by degree) and perhaps also whitespace between groups. I think the pipes are already there to do this since I think if we cluster, we end up with whitespace between the clusters.

Kindof like this?

[gfinak]

It's open source, feel free to add the feature.