Specify image origin in a unit test for DM-840
Remove explicit use of PARENT (use default instead)
Also remove some "from foo import *"
Fixed a clang warning by removing an unused variable.
Restore one image origin to local
Remove unused variable to address compiler warning
Remove unneeded extra declarations causing problems with clang.
Merge branch 'u/jbosch/clangfix'
Merge branch 'tickets/DM-1176'

Conflicts:
	include/lsst/meas/base/algorithms/SincFluxTemplates.h
Use default image origin of PARENT
Move low-level Sinc photometry code to a new file

This undoes some of Perry's work on DM-1067, but it's overall
a bigger cleanup and it allows us to start moving the aperture
flux implementations to a new algorithm class.
Start adding new ApertureFluxAlgorithm class
Add ApertureFluxAlgorithm, with just mid-level drivers for now
Add Result, ResultMapper classes for multi-aperture photometry
Move aperture flux result objects to the aperture flux files.
Begin work on plugin algorithm interface for ApertureFlux.