- added backwards calculation of hkl from four circle angles. This

required inclusion of a matrix package.
- modified  counter error handling to send a Stop when the _BAD_BUSY
  error is received.
- added an environment interface to the general controller stuff in choco.*
  Also added setting a parameter directly at the controller object.
- Added a driver for the ETH High Temperature Furnace to be used at
  SANS.

hkl.tex

@@ -18,6 +18,7 @@ $\langle$hkldat {\footnotesize ?}$\rangle\equiv$
 \mbox{}\verb@   typedef struct __HKL {@\\
 \mbox{}\verb@                         pObjectDescriptor pDes;@\\
 \mbox{}\verb@                         double fUB[9];@\\
+\mbox{}\verb@                         MATRIX UBinv;@\\
 \mbox{}\verb@                         double fLambda;@\\
 \mbox{}\verb@                         int iManual;@\\
 \mbox{}\verb@                         double fLastHKL[5];@\\