allow fetching secret keys using GnuPGContext.getKeyByFingerprint()
allow fetching secret keys using GnuPGContext.getKeyByFingerprint()

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