added option for decryption and added decryption calls
added decryption option description
added decryptPGP method and flattenMessage methode
added imap indication to password prompt
added extraction of pgp data and trying to decrypt it
added gpg passphrase fetching
fixed decryption
moved gpg functions and commented storing emails back
moved flattenMessage to util class
moved all encryption/decryption function in own classes
cleaned imap classes and moved crypto stuff in own module
repackaged decrypted email