- Mixins defined in Logger.h
- Mixin used in base classes (THcDC is currently a good example)

Added a few more spdlog loggers

Added logging to many.

- Added logging to hodoscope, aerogel hitlist and detectormap
- Working on scandalizer features.

Added logging.

Added more logging.

added more logging.

More logging.

1) THcExtTarCor.h
   a) add variables fxsieve and fysieve
   b) Added clear method so that fxsieve and fysieve could be set to kBig at start of each event.

2) THcExtTarCor.cxx
   a) Add variables extcor.xsieve and extcor.ysieve to tree
   b) Added clear method.
   c) Added calculation of xsieve and ysieve for golden track. The
      calculation depends on spectrometer. SHMS includes delta dependence
      when calculating ysieve.

  Add doxygen groups "Apparatuses" and "Decoders"
  Make sure every class is in a group
  Make sure most classes have a \brief description
  Improve comments for some classes including THcHallCSpectrometer
     and hodoscope classes
  Change some Doxyfile defaults.  Include sources files.

Fix sign mistake in correction for vertical pointing offset
   in THcExtTarCor.cxx

Write Hall C version of THcReactionPoint

THcHallCSpectrometer
  1) Add variables fMispointing_x and fMispointing_y
    which are filled by parameters hmispointing_x, hmispointing_y
      in PARAM/HMS/GEN/hmsflags.param and pmispointing_x, pmispointing_y
      in PARAM/SHMS/GEN/shmsflags.param .
   The offsets are used in THcExtTarCor and THaReactionPoint
  2) Modify argument to method CalculateTargetQuantities to be xtar
     instead of gbeam_y .

THcExtTarCor
   1) add call to get spectrometer pointing offsets
   2) The mispointing_x is added to xtar
   3) Set xtar to start as -beam_y = - vertex(1)+mispointing_x for first call to CalculateTargetQuantities
      After first call the xtar is recalculated using the returned xptar
      and a second call is done to get the target xptar,ytar,yptar and delta.
    4) Fill golden track with final xtar

Added call trkifo->Set since it is used in THcPrimaryKine and THcSecondaryKine

Fill golden track with target quantities after correction for
  vertical target position.

Add code for doing the vertical target position
   correction to the optics.