Add calorimeter efficiency calculations. (#207)

* Add efficiency calculations for the layers of the calorimeters.

* Add efficiency calculation for the Array part of calorimeter.

* Update phgcer_calib.param

@vardant These calibration numbers should be included in hallc_replay/PARAM/SHMS/HGCER/CALIB/KPP_Spring_2017/.  For reference the gain constants for run 464 were phgcer_adc_to_npe = 1/111., 1/118., 1/122., 1/125.

* Update pcal_geom.param

Fix some typos