refine search for DCMTK libraries
more updates to the 3D DICOM reading
add functions to erase attributes and get values directly
add support for loading 3D sets from DICOM
loading of 3D data from DICOM works
make test of uninstalled code run
clean up source tree
rename to prepare 3D implementation
finalize transitision to separate library for dicom access
move loading and storing to new plugin