Start the process of creating receptor models, including cones, rods, and iprgc models.
Comment.
Merge branch 'master' into conemodel

Conflicts:
	colorContours/colorContours.m
Merge branch 'master' into conemodel

Conflicts:
	colorContours/colorContours.m
Merge branch 'master' into conemodel
Using colorContours.m from master
Merge branch 'master' into conemodel
Merge branch 'master' into conemodel
Merge branch 'master' into conemodel
Merge branch 'conemodel' of https://github.com/wandell/frontend into conemodel
Moved into separate folder
Keep these for the moment.  Integrate all the ellipse stuff when we have a moment to think about fitting.
Compare irradiance from PTB and ISET.
Useful for now for testing irradiance.
We may just get rid of them and put in a function to create them some time.
Moved from one folder up.
Moved the files.  Neatened a bit.  On to calculating cone isomerizations.
Start of simplification.
Simplification and validation.
Validation script looks promising.
Continuing to work on simple test.
More checking and PTB ISETBIO integration