Add multi-frame handling.

- Exif of all frames are displayed in the Editor's Exif tab (without
separator)
- isHDR and isPixelShift is added to the data files stored in cache
- In the Editor panel, the QuickInfo frame display the HDR and
PixelShift information, as well as the number of frame and bit-depth for
HDR image
- the number of frame is provided by dcraw. If not set, it is provided
by the Exif's main IFD count
- the PixelShift information (for Pentax as of now) is provided by
looking at the Exif informations
- the HDR information is provided by the Exif information of the first
frame for Pentax raw files, or by the bitspersample, sampleformat and
compression tags for other files

TODO: add icons to the thumbnails to tag HDR and PixelShift files.

rtgui/exifpanel.cc

@@ -177,15 +177,28 @@ void ExifPanel::setDefaults (const ProcParams* defParams, const ParamsEdited* pe
     defChangeList = defParams->exif;
 }
 
-void ExifPanel::setImageData (const ImageMetaData* id)
+void ExifPanel::setImageData (const FramesMetaData* id)
 {
 
     idata = id;
     exifTreeModel->clear ();
 
-    if (id && id->getExifData ()) {
-//        id->getExifData ()->printAll ();
-        addDirectory (id->getExifData (), exifTreeModel->children());
+    if (id) {
+        //bool first = true;
+        // HOMBRE: Should we only display the current frame's Exifs ?
+        for (int frameNum = 0; frameNum < id->getFrameCount (); ++frameNum) {
+            if ( id->getExifData (frameNum)) {
+                /*
+                if (!first) {
+                    Gtk::Separator *sep = Gtk::manage (new Gtk::Separator);
+                    sep->set_orientation(Gtk::ORIENTATION_HORIZONTAL);
+                    first = false;
+                }
+                */
+                //id->getExifData ()->printAll ();
+                addDirectory (id->getExifData (frameNum), exifTreeModel->children());
+            }
+        }
     }
 }