Create test for loading of the config file.
Move getCcdKeyName to `util` to make generally available.

Simplified names of (check,plot)AstrometryPhotometry.py to check.py, plot.py
Added print.py to handle printing.
Include YAML example file for CFHT.

Can now run with, e.g.:
   validateDrp.py CFHT/output examples/runCfht.yaml

Create Quick versions for Cfht and Decam for debugging runs.
Just one CCD.

Note these will fail AM2, because they're just one CCD
and AM2 is looking for stars separated by 20 arcminutes.

Pass MAPPER, INGEST, PROCESSCCD to runExample.

runExample needs to know the CAMERA, MAPPER, the CONFIG_FILE
and any specially needed versions of ingestImages.py or processCcd.py
Specifically DECam needs these custom versions.

Also remove 'run' prefix from .YAML files.

Add description of Quick examples to README
Use hw.logicalcpu on Darwin.