added function to read 4 energy calibration coefficients for eiger, comments on how to add them to the software

slsDetectorSoftware/slsDetectorAnalysis/energyConversion.h

@@ -45,6 +45,33 @@ class energyConversion
   */
   static int writeCalibrationFile(string fname, double gain, double offset);
 
+
+
+  
+  /**
+      reads a calibration file 
+      \param fname file to be read
+      \param gain reference to the gain variable
+      \offset reference to the offset variable
+  */
+  static int readCalibrationFile(string fname, double *gain, double *offset, detectorType myDetectorType);
+  
+  /**
+      writes a calibration file 
+      \param fname file to be written
+      \param gain 
+      \param offset
+  */
+  static int writeCalibrationFile(string fname, double *gain, double *offset, detectorType myDetectorType);
+
+
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+
 #ifndef MYROOT
 
   /**