ENH: Convert strings from DICOM datasets and DICOMDIRs to Unicode QStrings. The proper codec to use is chosen according to the Specific Character Set (0008,0005) DICOM tag, if present. If the tag is not present, the codec is chosen according to the system locale, which is what was done in all cases before updating to Qt5.
ENH: Save values in the database in UTF-8.
ENH: Write to the log file in UTF-8.
ENH: Pass strings to VTK in UTF-8.