Added dark frame subtraction

Moved debayer and preprocessing parameters to class ProcParams for every single image.
Added tab RAW for changing those parameters.
Progress bar shows only load step (work to do)

rtgui/cacheimagedata.h

@@ -0,0 +1,67 @@
+/*
+ *  This file is part of RawTherapee.
+ *
+ *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
+ *
+ *  RawTherapee is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ * 
+ *  RawTherapee is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _CACHEIMAGEDATA_
+#define _CACHEIMAGEDATA_
+
+#include <glibmm.h>
+#include <options.h>
+
+class CacheImageData {
+
+    public:
+
+        // basic informations
+        Glib::ustring  md5;
+        int   version;
+        bool  supported;
+        ThFileType  format;
+        char  rank;
+        bool  inTrash;
+        bool  recentlySaved;
+
+        // time/date info
+        bool  timeValid;
+        short year;
+        char  month;
+        char  day;
+        char  hour;
+        char  min;
+        char  sec;
+        char  msec;
+
+        // exif info
+        bool  exifValid;
+        double fnumber;
+        double shutter;
+        double focalLen;
+        unsigned iso;
+        Glib::ustring lens;
+        Glib::ustring camera;
+
+        // additional info on raw images
+        int   rotate;
+        int   thumbImgType;
+        int   thumbOffset;
+
+        CacheImageData ();
+        
+        int load (const Glib::ustring& fname);
+        int save (const Glib::ustring& fname);
+};
+#endif