Remove frequency-domain scaling.
Fix compilation warnings.
Re-enable VOL tailer.
Update CMake configuration.
Merge branch 'dev' of https://github.com/rgrandin/CppClasses into dev
File reorganization.

Moved DataFilters to research repository.
Add comment for voxel flag state variable.
Change coord-sys conversion control method.

Now uses status of member variable rather than a #define symbol.
Update Qt inheritance.
Reorganize documentation.
Add explicit typecast.

Fix warning in MSVC.
Partial-fix for assignment operator.

Don't count on this working.