Color calculation functions added

Spectrum + gel -> XYZ calc added
color tweaks
Metadata util functions
Merge branch 'local' into working
Refactors and additional color functions
Added gel colors needed for ML project

To add more, just add the right data to the maps in LumiverseColorLib.h
Added intensity scaling based on gel filter used

Gels subtract a percentage of light from the total output
little application for generating features for machine learning project
close the file to be clean
Additional colors and can specify multiple gels at once
More colors added to the library