reduce the keylist return to the bare minimum for speed
reduce the keylist return to the bare minimum for speed

This makes the keylist functions return much less information, so hopefully
it will speed things up.  There should be an option for getting the full
info when its needed.

refs #1621

eighthave/gnupg-for-java,HellUnit/gnupg-for-java,HellUnit/gnupg-for-java,HellUnit/gnupg-for-java,eighthave/gnupg-for-java,guardianproject/gnupg-for-java,guardianproject/gnupg-for-java,guardianproject/gnupg-for-java,eighthave/gnupg-for-java,HellUnit/gnupg-for-java