- Rearranged directory structure for forking out ANSTO

- Refactored site specific stuff into a site module
- PSI specific stuff is now in the PSI directory.
- The old version has been tagged with pre-ansto

bruker.w

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+\subsubsection{Bruker Magnet Controller B-EC-1}
+SANS is using a Bruker magnet controller. This controller is integrated
+into SICS as a derivate of an environment controller.  The Bruker controller 
+can be operated in two modes: in the first the  current is controlled,
+in the  second the current
+is controlled by an external hall sensor giving the magnetic field. Whatever
+is the controlling sensor, the magnetic field and the current need to be
+read. Furthermore this device supports switching the polarity. All this is
+achieved with a special driver and an additional wrapper function for
+handling extra commands. All this is implemented in the file bruker.h
+and bruker.c. The functions defined are:
+
+\begin{verbatim}
+    pEVDriver CreateBrukerDriver(int argc, char *argv[]);
+    
+    int BrukerReadField(pEVControl self, float *fField);
+    int BrukerReadCurrent(pEVControl self, float *fCurrent);
+    
+    int BrukerAction(SConnection *pCon, SicsInterp *pSics, void *pData,
+                     int argc, char *argv[]);
+  
+\end{verbatim}
+
+\begin{description}
+\item[CreateBrukerDriver] creates a driver for the bruker magnet
+controller.
+\item[BrukerReadField] reads the current magnetic field.
+\item[BrukerReadCurrent] reads the current current in Ampere.
+\item[BrukerAction] a special SICS interpreter wrapper function  for
+the Bruker Magnet. This function handles the few special Bruker
+commands and passes everything else to the standard environment
+controller handler function. 
+\end{description}
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