ij-plugins Toolkit v.1.4.2

ij-plugins Toolkit v.1.4.2 at http://sourceforge.net/projects/ij-plugins/files/ij-plugins_toolkit/v.1.4.2/

New:
* SRG: Add action icons.
* SRG: Send/load regions from ROI Manager.

Improved:
* Better Glass Pane implementation.
* Update RGB <-> Lab conversions to better match http://www.brucelindbloom.com

Developer visible:
* Add KMeans.closestCluster(final float[] x) to enable using result to cluster new image.