Merge

Demosaicing and pre-processing parameters selectable for each image.
Dark frames subtraction and badpixels file support
Fast loading in editor.

rtgui/imagearea.cc

@@ -44,6 +44,7 @@ ImageArea::ImageArea (ImageAreaPanel* p) : parent(p) {
     signal_size_allocate().connect( sigc::mem_fun(*this, &ImageArea::on_resized) );
 
     dirty = false;
+    ipc = NULL;
 }
 
 void ImageArea::on_realize()