Basic ar image rgb working
Interpolate colors for image_rgb (draft 2; works)
Replot function working.
Fixed box-zoom on AR; AR skips ajax requests with now screen bounds
First render returns empty image and data bounds
Cleanup example
adding under-defined state guard to image and line downsample (line downsample still not working properly)
DRAFT insertion of isocontours

also renamed 'Transfer' to 'Shader'
WIP: Contours; multi_line erroneously assumes datatime for ranges...
Swapped order of types so NaN deserializes None instead of Today
WIP: Contours -- Does not error...does not plot anything.
ISO contours appear (incorrectly labeled, all colored the same...but they exist).
Restoring test pattern demos
Progress on Contours, but not complete yet.
Different color contours in demo
Properly registered iso contours...
still has that annoying line in it.
ISO contours and spread updated
Updated for changed contour module name in AR
Bit of cleanup
Merging master