Creating Rieke adaptation model functions
update to rieke cone adapt
Add reference and comments to cone adaptation
Add support for multi-pixels in one psfs

In some display sub pixel design, it’s possible that the sub pixel
pattern is not repeated by every pixel, but by block of pixels. Here we
added a render function handle and some other components to support
this kind of sub pixel patten.
Add more properties to displays

contrast, black radiance, dark luminance, dark mask reflectance, etc.
Check in rieke's cone adaptation model
Add dark level to displayGet
Turn off gpu computing always
Add dark radiance to scene in vcReadImage
Ambient light issue

when creating a scene from image on display, we care about the black
mask reflectance and the ambient lighting conditions now
Create data file for RGBW display

We want to simulate a Samsung Galaxy Tab Pro 10.1 display. But we don’t
have the spectral power distribution for the primaries. We just made up
the value from LCD-Apple...
update displayGet for RGBW display
Update vcReadImage to support RGBW display
Add RGBW support in display GUI
fix GUI for RGBW
Fix negative values in psfs in sony pled
update displaySet for RGBW
fix typo for displayGet
Add more examples in displayIntroduction
Organizing the Rieke adaptation code