Adding softproofing. Now the output profile and the new rendering intent

profile for the output profile will only be shown when the new softproof
toggle button (bottom of the preview in the Editor panel) will be on.

rtengine/dcrop.h

@@ -54,6 +54,7 @@ protected:
     // -----------------------------------------------------------------
     float**      cbuffer;
 
+    bool softProofing;     /// True if the Crop has to display a soft proof of the output with its profile
     bool updating;         /// Flag telling if an updater thread is currently processing
     bool newUpdatePending; /// Flag telling the updater thread that a new update is pending
     int skip;
@@ -103,6 +104,10 @@ public:
     /** @brief Asynchronously reprocess the detailed crop */
     void fullUpdate  ();  // called via thread
 
+    void setSoftProofing(bool doSoftProof) {
+        softProofing = doSoftProof;
+    }
+
     void setListener    (DetailedCropListener* il);
     void destroy        ();
     int  get_skip       ()