Adding encrypt dialog. (Not done yet.)

Signed-off-by: FellowTraveler <F3llowTraveler@gmail.com>
DONE: PGP-style menu: encrypt/decrypt/sign/verify.

Signed-off-by: FellowTraveler <F3llowTraveler@gmail.com>
Merge pull request #109 from FellowTraveler/develop

PGP-style menu option for encryption/decryption/signing/verification