Added support for hue-saturation-value (HSV) color model

Change-Id: I9e4f73bc1f184a81e7b1dee13322d588c97519ba
Reviewed-on: https://iffwww.iff.kfa-juelich.de/review/116
Reviewed-by: Florian Rhiem <f.rhiem@fz-juelich.de>
Reviewed-by: Josef Heinen <j.heinen@fz-juelich.de>
Fixed array subscript bug

Change-Id: I0a1a2120cf1fd8c4dc4f98c073a9a80648ed5281
Reviewed-on: https://iffwww.iff.kfa-juelich.de/review/117
Reviewed-by: Josef Heinen <j.heinen@fz-juelich.de>
Corrected 'domain_coloring' demo

Change-Id: Ie0f404cb2190aa5c05070ea169af200adf8cd492
Reviewed-on: https://iffwww.iff.kfa-juelich.de/review/118
Reviewed-by: Josef Heinen <j.heinen@fz-juelich.de>