- Scriptcontext debugged to be working

- Added a drivable adapter to scriptcontext nodes
- Added subsampling to simulated histograms (and as a general option) in
  order to support Gumtree testing.

polldriv.h

@@ -20,6 +20,8 @@ typedef struct __POLLDRIV{
         /* function called to determine if this object must be polled */ 
     int (*poll)(struct __POLLDRIV *self, SConnection *pCon);   
         /* the actual polling function */
+    void (*killObjPointer)(void *data);
+        /* a function to possibly kill the objPointer. Can be NULL */
 }PollDriv, *pPollDriv;
 /*==================== the interface =====================================*/
 /*