Added support to parse QuaMeter IDFree metrics values from the
metrics.json file. 
DetailsFrame.java: Increased column sizes to accommodate QuaMeter
metrics keys, description and values. 
JsonMetricsReader.java: 
Changed function readJsonValues(...) to
readJsonValuesForGenericAndNISTMetrics(...).
Added function readJsonValuesForQuaMeterIDFreeMetrics(...) for reading
QuaMeter metrics values from the metrics.json file. 
ReportReader.java now uses readJsonValuesForGenericAndNISTMetrics(...)
and readJsonValuesForQuaMeterIDFreeMetrics(...). 
MetricsListing.txt: 
Added QUaMeter IDFree metrics keys and description in the
MetricsListing.txt file.