jobcount is no longer increased for images excluded by date range
jobcount is no longer increased for images excluded by date range

See issue #71

jshoyer/plantcv,danforthcenter/plantcv,stiphyMT/plantcv,jshoyer/plantcv,stiphyMT/plantcv,AntonSax/plantcv,danforthcenter/plantcv,AntonSax/plantcv,stiphyMT/plantcv,danforthcenter/plantcv