* gost3411_94 renamed to gost341194
* gost3411_2012 renamed and splitted to gost34112012256, gost34112012512
* GOST34112012 splitted to GOST34112012256, GOST34112012512
* gost3410.kek moved to separate gost3410_vko.kek_34102001
* VKO GOST R 34.10-2012 appeared in gost3410_vko, with test vectors
* 34.11-94 digest is reversed, to be compatible with HMAC and
PBKDF2 test vectors describe in TC26 documents
* 34.11-94 PBKDF2 test vectors added
* gost3410.prv_unmarshal, gost3410.pub_marshal, gost3410.pub_unmarshal
helpers added, removing the need of x509 module at all
* gost3410.verify requires (pubX, pubY) tuple, instead of two separate
pubX, pubY arguments
* 34.11-94 based PBKDF2 function added
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