add simple, java-ish decrypt methods
add simple, java-ish decrypt methods

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