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/lensprofile.cc

@@ -110,7 +110,7 @@ void LensProfilePanel::read(const rtengine::procparams::ProcParams* pp, const Pa
     conUseDist.block(false);
 }
 
-void LensProfilePanel::setRawMeta(bool raw, const rtengine::ImageMetaData* pMeta)
+void LensProfilePanel::setRawMeta(bool raw, const rtengine::FramesMetaData* pMeta)
 {
     if (!raw || pMeta->getFocusDist() <= 0) {
         disableListener();