package PGP;
sub new
sub Debug
sub Exec
sub Sign
sub Encrypt
sub Decrypt
sub Document_Info
package PGP::Keyring;
sub new 
sub Add_Key
sub Remove_Key
sub Extract_Key
sub Generate_Key
sub Revoke_Key
sub List_Keys
sub Find
package PGP::Key;
sub new
sub Add_ID
sub keyparse
sub Trust
subroutine is very much like PGP::Key::Trust. It also needs to be 
sub Validity
sub Fingerprint
sub dump
