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.

rtengine/imageio.h

@@ -29,6 +29,7 @@
 #define IMIO_CANNOTWRITEFILE       7
 
 #include "rtengine.h"
+#include "imageformat.h"
 #include <glibmm.h>
 #include "procparams.h"
 #include <libiptcdata/iptc-data.h>
@@ -43,31 +44,6 @@ namespace rtengine
 class ProgressListener;
 class Imagefloat;
 
-typedef enum IIO_Sample_Format {
-    IIOSF_UNKNOWN        = 0,       // Unknown or Unsupported file type; Has to remain 0
-    //IIOSF_SIGNED_INT         ,    // Not yet supported
-    IIOSF_UNSIGNED_CHAR  = 1 << 0,
-    IIOSF_UNSIGNED_SHORT = 1 << 1,
-    //IIOSF_HALF               ,    // OpenEXR & NVidia's Half Float, not yet supported
-    IIOSF_LOGLUV24       = 1 << 2,
-    IIOSF_LOGLUV32       = 1 << 3,
-    IIOSF_FLOAT          = 1 << 4
-} IIOSampleFormat;
-
-typedef enum IIO_Sample_Arrangement {
-    IIOSA_UNKNOWN,       // Unknown or Unsupported file type
-    IIOSA_CHUNKY,
-    IIOSA_PLANAR
-} IIOSampleArrangement;
-
-typedef enum SensorType {
-    ST_NONE,   // use this value if the image is already demosaiced (i.e. not a raw file)
-    ST_BAYER,
-    ST_FUJI_XTRANS,
-    ST_FOVEON,
-    //ST_FUJI_EXR
-} eSensorType;
-
 class ImageIO : virtual public ImageDatas
 {