modifications in calibGenCAL

• calibrations for flight gain in high energy diode
  • high energy diode was always calibrated at muon gain - we have to produce also the set of calibration files for flight gain
  • it is necessary for beam test - otherwise energies above 1 GeV won't be reconstructed correctly
• correction to charge injection calibration at low DAC setting 
  • charge injection points DAC=0 and DAC=2 should NOT be used - the curve should be linearly extrapolated from few higher points (DAC = 4-12) 
• correction for crosstalk from low enegy to high energy diode
  • 3-5 % correction
  • effect is changing when low energy diode is saturated - correction is important for test beam
  • test beam is the only case when this effect could be confirmed with real signals ( not with charge injection)