Merged changes from SESI for compatibility with C++11 compilers.
Improved vector transform support in Transform and Resample SOPs.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	openvdb/Platform.h
	openvdb/tools/VolumeToMesh.h
	openvdb/unittest/TestTools.cc
	openvdb/util/MapsUtil.h
	openvdb_houdini/houdini/SOP_OpenVDB_Filter_Level_Set.cc
	openvdb_houdini/houdini/SOP_OpenVDB_Fracture.cc
	openvdb_houdini/houdini/SOP_OpenVDB_From_Particles.cc
	openvdb_houdini/houdini/SOP_OpenVDB_Noise.cc