Version 2.2.0
openvdb 2.3 beta
various improvements
new Houdini SOPs
Fix math::Abs() truncation for non-Windows platforms

For Abs(int64_t), use labs() for non-Windows, because abs() on glibc only takes
a int32 parameter. On Windows, we can't use labs() because sizeof(long) is
always 4. We could use llabs() instead on Windows but as of Visual Studio 2012,
it's implemented as a library function that does a ternary operator.

For Abs(long double), use fabsl() which takes a long double instead of fabs()
which takes a double. This exists on all 3 platforms that we currently support.
Previously, fabs() would work on Windows because it provides a long double
overload that called fabsl().
Merge pull request #16 from sideeffects/send_upstream

Fix math::Abs() truncation for non-Windows platforms
Various fixes
Merge branch 'master' of ssh://github.com/dreamworksanimation/openvdb_dev
Add missing openvdb.h #include in RayIntersector.h
Instead of including openvdb.h in RayIntersector, use TreeT instead of BoolTree
Merge pull request #17 from sideeffects/send_upstream

Add missing openvdb.h #include in RayIntersector.h
Version 2.3.0
Merge branch 'master' of ssh://github.com/dreamworksanimation/openvdb_dev
Fix LeafNodeBool::Buffer::getValue() to NOT return the address of a temporary when compiled with Visual C++.
Merge pull request #20 from sideeffects/send_upstream

Fix LeafNodeBool::Buffer::getValue() to NOT return the address of a temporary when compiled with Visual C++.
various fixes
various fixes
various fixes
Merge remote-tracking branch 'upstream/master' into send_upstream
Backport changes from Houdini trunk

Only notable changes to two nodes:

- SOP_OpenVDB_Advect_Points.C
    - Add support for traillen attribute

- SOP_OpenVDB_Convert.C
    - Disable adding to seamPointGroup if we don't have pointFlags() to avoid
      out of bounds access leading to a crash. (bug #62017)
    - Use a half width of 3 voxels instead of 1 when converting fog VDBs to SDF.
    - Fix bug where converting fog volumes to SDF in Convert VDB ignored the
      isovalue. To ensure backwards compatibility, a new fogisovalue parameter
      is added that defaults to the old 0.5 value. (bug #61477)