Add a little memo about images holding overlays, and the way for extracting them

diff --git a/imagesWithOverlays.README.txt b/imagesWithOverlays.README.txt
new file mode 100755 (executable)
index 0000000..61f0202
--- /dev/null
+++ b/imagesWithOverlays.README.txt
@@ -0,0 +1,40 @@
+// --------------------------------------------------------------------
+
+US_Siemens_Antares_With_PixelSpacing_Without_AspectRatio.dcm
+vtkgdcmViever2 ... o doesn't work
+exExtractOverlaysDCM --> Black image (OK, since 6000|3000 is zeroed!)
+exExtractOverlaysACR --> "8 bits pixel image cannot contain Overlays"!
+
+// --------------------------------------------------------------------
+
+SIEMENS_GBS_III-16-ACR_NEMA_1.acr
+vtkgdcmViever2 ... o : black image
+exExtractOverlaysDCM --> rotten image
+exExtractOverlaysACR --> 4 images
+
+// --------------------------------------------------------------------
+
+XA_GE_JPEG_02_with_Overlays.dcm
+vtkgdcmViever2 ... o works!
+exExtractOverlaysDCM --> 8 Black images
+exExtractOverlaysACR --> 7 Black images + 1 image OK
+
+// --------------------------------------------------------------------
+
+05115014-mr-siemens-avanto-syngo-with-palette-icone.dcm
+vtkgdcmViever2 ... o doesn't work.
+exExtractOverlaysDCM --> OK
+
+MR-SIEMENS-DICOM-WithOverlays.dcm
+vtkgdcmViever2 ... o doesn't work
+exExtractOverlaysDCM --> OK
+
+OverlayDICOMDataSet.dcm
+vtkgdcmViever2 ... o doesn't work
+exExtractOverlaysDCM --> OK
+
+MR-SIEMENS-128x104-with-overlays.dcm
+vtkgdcmViever2 ... o doesn't work
+exExtractOverlaysDCM --> OK
+
+// --------------------------------------------------------------------