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/safegtk.h

@@ -0,0 +1,33 @@
+#ifndef SAFE_GTK_H_INCLUDED
+#define SAFE_GTK_H_INCLUDED
+
+#include <gtkmm.h>
+#include <glibmm.h>
+#include <giomm.h>
+
+Glib::RefPtr<Gdk::Pixbuf> safe_create_from_file(const std::string& filename);
+Cairo::RefPtr<Cairo::ImageSurface> safe_create_from_png(const std::string& filename);
+
+class FileMTimeInfo {
+
+    public:
+        Glib::ustring fname;
+        Glib::TimeVal mtime;
+        
+        FileMTimeInfo (Glib::ustring name, Glib::TimeVal mtime) : fname(name), mtime(mtime) {}
+        bool operator<(const FileMTimeInfo& other) const { return mtime<other.mtime; }
+};
+
+Glib::RefPtr<Gio::FileInfo> safe_query_file_info (Glib::RefPtr<Gio::File> &file);
+void safe_build_file_list (Glib::RefPtr<Gio::File> &dir, std::vector<FileMTimeInfo> &flist);
+void safe_build_file_list (Glib::RefPtr<Gio::File> &dir, std::vector<Glib::ustring> &names, const Glib::ustring &directory = "");
+void safe_build_subdir_list (Glib::RefPtr<Gio::File> &dir, std::vector<Glib::ustring> &subDirs, bool add_hidden);
+
+bool safe_spawn_command_line_async (const Glib::ustring& cmd_utf8);
+
+Glib::ustring safe_locale_to_utf8 (const std::string& src); // from rtengine
+std::string safe_locale_from_utf8 (const Glib::ustring& utf8_str);
+
+
+
+#endif