Moved ValueConversion.h and VolumeSampler.h to the public API. Fixed includes and list of headers to install.

Added complete documentation for VolumeDataAxisDescriptor. Got rid of the CoordinateRange since it's not really a range (i.e. Max can be smaller than Min) and documented this better. Fixed documentation for VolumeDataAccessManager::GetVolumeDataLayout().

Removed Access enum as it was not used (read/readwrite access is handled when you create the VolumeDataPageAccessor, not when you open the VDS).

on public Function and public Members

Refactored the Open/Close methods so there are alternate versions that take an IOManager instead of OpenOptions. This is meant to make it easier to test the code by creating IOManagers that e.g. store everything in memory instead of in an object store. Renamed the Destroy(handle) method to Close(handle) and added documentation for Open/Create/Close calls.

Fixed the HueVolumeDataRegionOverlappingChunk method so it adds the correct amount of ExtraValidVoxels when the target layout has different render margins from the source.