Working on cascading shadow maps.
Fix for shadow map rendering.
Progress on selecting cascades.
Retain "simple" shadows, supply cascaded as option.
Cascaded shadow maps for models.
Trying a different way of determining the cascade threshold distances.
Apply the new shadow distances to the models, too.
Merge branch 'master' of https://github.com/highfidelity/hifi into cascade
Distance tweak.
Hide distances; they no longer need to be publicly visible.
Merge pull request #2955 from ey6es/cascade

Basic cascaded shadow maps for increased shadow draw distance.