Merge pull request #6 from sideeffects/send_upstream

Dense::valueCount() now correctly returns an Index64
various changes
Merge remote branch 'origin/master'
various changes
various changes
Version 2.0.0 prerelease
Version 2.0.0 prerelease
Version 2.0.0 prerelease
Version 2.0.0 prerelease
Version 2.0.0 prerelease
Windows fix for tools/RayTracer.h since near/far are macros
Merge from Houdini trunk