Logger is used almost everywhere.

	modified:   ../CMakeLists.txt

	modified:   Dockerfile
	modified:   ../../src/CMakeLists.txt

- Lots of additional logging after moving spdlog out of project
- The loggers are mostly defined in the header `analyzer/include/podd2/Logger.h`
- Next step  is to add file logging and to set good defaults
- The spdlog severity level (in order of importance) are:
  - critical
  - error
  - warn
  - info
  - debug
  - trace

	modified:   THcHallCSpectrometer.cxx
	modified:   THcHallCSpectrometer.h
	modified:   THcPrimaryKine.cxx
	modified:   THcSecondaryKine.cxx
	modified:   THcTrigDet.cxx

- removed spdlog ( now in analyzer)
- added logging to THaAnalzyer (podd)

In THcScalerEvtHandler::AnalyzeBuffer there is a loop over
the scalers to keep track of scalers with a cut on the current.
There was a mistake in using scal_prev_read[nscal-1] instead of
dvars_prev_read[ivar] in the IF statement.

fGoodFlags holds event-by-event data, but was never cleared,
eventually growing to several hundred megabytes in a long analysis.
The effciency calculations in THcHodoEff that rely on the contents
of fGoodFlags have been most certainly garbage up to now.

I've replaced the event-by-event ClearEvent() method with the
standard virtual function Clear() and have added fGoodFlags.clear()
there.

Also, I've added assertions to the hodoscope code to check
the validity of some non-obvious array indices. Nothing triggers;
the index logic appears sound (despite its appearance ...)

This includes a particularly nasty leak in the shower code that caused
several hundred bytes to be lost _per event_.

	modified:   containers/singularity/Singularity

	modified:   config.env

	modified:   containers/docker/Makefile
	modified:   containers/singularity/Singularity

	modified:   Makefile
	modified:   config.env

Currently both CMake and SCons build not only libPodd, but also libHallA,
even though it is not required for hcana. hcana is linked only against
libPodd, however, so libHallA is simply a spurious byproduct.

These are mostly wrappers around stl algorithms.

	new file:   include/hcana/helpers.hxx