optimized CoverageRegion to track _currentCoveredBounds and not test polygons in the tested ocludee is not in those covered bounds
added support for clipping polygons to screen bounds, not yet enabled since it doesn't help performance, will use in future
added comment
Merge branch 'master' of https://github.com/worklist/hifi into occlusion_culling
added sorting polygons by size
latest version of quadtree coverage map
latest version of quadtree coverage map
cleaned up CoverageMapV2 recursion code, fixes crazy false occlusion
DRY up code in polygon
good progress on merging polygons
more progress on merging
more progress on merging
Merge branch 'master' of https://github.com/worklist/hifi into occlusion_culling
fixed FOV preference with projection matrix
tweak perfstats to not display WARNING! when caller asked it to always print (non-warning case)
removed debug code
debug statistics for intersect calls
debug stats
added some timing debugging, and bail early if voxel server is slow
(cherry picked from commit 485c603d4fe8dbd0bedc8ac2dec717cece2e7076)
tweaks to debug messages