Merge remote-tracking branch 'origin/master' into mhfem

* origin/master:
  Fixing build script.
  Adding OpenMP to vector operations.
  Fixing a bug in host and device arrays comparison.
  Fixing the DICOM reader.
  Fixing DCMTK code to work when DICOM support is not enabled.
  Fixing #1 - tnl-dicom-reader, tnl-image-converter
  Implementing the DICOM reader.
  Implementing the DICOM reader.
  Refactoring code for the DICOM format support.
  Addign DICOM support - TNL can be succesfully build now.
  JPEG format is working.
  Implementing JPEG image write.
  Implementing JPEG image.
  Adding JPEG format support.
  Adding PNG format support.
  Adding conversion from .tnl file to image.
  Implementing image converter.
  Implementing image converter.
  Implementing the image converter.
  Adding image converter.