Add some doco
Move the Default reader to be a JSS reader.

The reader now reads the cert and key out of hte nss db.
To load the keys into the nss db from the standard pkcs12 keystore, the user would execute:

pk12util -v -i keystore -d sql:/etc/pki/nssdb

In addition, the LD_LIBRARY_PATH in /etc/tomcat6/tomcat6.conf should be

LD_LIBRARY_PATH=/usr/lib64/jss/libjss4.so

Note, this causes tomcat to act flakey