Add voronoi computation
Added isoline view
Added caching for color maps
Defer updating jnd panel
Merge branch 'master' into voronoi

Conflicts:
	src/main/java/main/JndViewPanel.java
Bilinear interpolation
Reorganized cached color maps
Fixed accuracy issues in some colormaps
Add circular probing for jnd view
Avoid unneccessary redraw
Use floats in cached images
Clean up jnd view