Log Message:
Update security/py-crypto to 2.5

Upstream changes:

2.5
===
* Added PKCS#1 encryption schemes (v1.5 and OAEP). We now have
a decent, easy-to-use non-textbook RSA implementation. Yay!

* Added PKCS#1 signature schemes (v1.5 and PSS). v1.5 required some
extensive changes to Hash modules to contain the algorithm specific
ASN.1 OID. To that end, we now always have a (thin) Python module to
hide the one in pure C.

* Added 2 standard Key Derivation Functions (PBKDF1 and PBKDF2).

* Added export/import of RSA keys in OpenSSH and PKCS#8 formats.

* Added password-protected export/import of RSA keys (one old method
for PKCS#8 PEM only).

* Added ability to generate RSA key pairs with configurable public
exponent e.

* Added ability to construct an RSA key pair even if only the private
exponent d is known, and not p and q.

* Added SHA-2 C source code (fully from Lorenz Quack).

* Unit tests for all the above.

* Updates to documentation (both inline and in Doc/pycrypt.rst)

* All of the above changes were put together by Legrandin (Thanks!)

* Minor bug fixes (setup.py and tests).