Fix issue compiling metadata def on pre-C++11

Change-Id: I69ce9b5164029826ac6ae4a0547b3639715b420d
Signed-off-by: Rob Adams <readams@readams.net>
Exit when invalid command line parameter is passed.
Fix debug log message left in accidentally

Change-Id: I9a4eda9fde92f9aa899f32f77ffd79c34098e4d2
Signed-off-by: Rob Adams <readams@readams.net>
Make Classifier abstract to avoid issue with incorrect subjects in
references.
Make example policy more useful/realistic

Change-Id: I983138c131a1a06c60e2183f5eef935eab599829
Signed-off-by: Rob Adams <readams@readams.net>