GPGME Python bindings

* Added GPGME bindings description and the standard encryption and
  decryption example.

docs/scenarios/crypto.rst

@@ -40,6 +40,52 @@ Example code using high level symmetric encryption recipe:
 
 
 
+GPGME bindings
+--------------
+
+The `GPGME Python bindings <https://dev.gnupg.org/source/gpgme/browse/master/lang/python/>`_ provide pythonic access to `GPG Made Easy <https://dev.gnupg.org/source/gpgme/browse/master/>`_, a C API for the entire GNU Privacy Guard suite of projects, including GPG, libgcrypt and gpgsm (the S/MIME engine). It supports Python 2.6, 2.7, 3.4 and above. Depends on the SWIG C interface for Python as well as the GnuPG software and libraries.
+
+Available under the same terms as the rest of the GnuPG Project: GPLv2 and LGPLv2.1, both with the "or any later version" clause.
+
+Installation
+------------
+
+Included by default when compiling GPGME if the configure script locates a supported python version (which it will if it's in $PATH during configuration).
+
+Example
+-------
+
+.. code-block:: python3
+
+	import gpg
+	import os
+	
+	# Encryption to public key specified in rkey.
+	rkey = "0xDEADBEEF"
+	text = "Something to hide."
+	plain = gpg.core.Data(text)
+	cipher = gpg.core.Data()
+	c = gpg.core.Context()
+	c.set_armor(1)
+	c.op_keylist_start(rkey, 0)
+	r = c.op_keylist_next()
+	c.op_encrypt([r], 1, plain, cipher)
+	cipher.seek(0, os.SEEK_SET)
+	ciphertext = cipher.read()
+
+	# Decryption with corresponding secret key
+	# invokes gpg-agent and pinentry.
+	plaintext = gpg.Context().decrypt(ciphertext)
+
+	# Matching the data.
+	if text == plaintext[0].decode("utf-8"):
+	    print("Hang on ... did you say *all* of GnuPG?  Yep.")
+	else:
+	    pass
+
+
+
+
 PyCrypto
 --------