added spongent hash function with all its variants (tested with the published test vectors)

fixed Neeva implementation and extended for all three available test vectors;

neeva: changed xor to modular addition and fixed the sources and targets

added neeva impl and test vectors, but it doesn't work (waiting for reference implementation to find the bug)

added XXTEA implementation

added XTEA implementation and tests

added Tiny Encryption Algorithm implementation with generated test cases

updated build directory

fixed GOST28147 cipher implementation and added testing code with random test vectors generated from BouncyCastle

changed OMAC2 switch from function to property

added tests for streaming API of GOST Streebog and added large message tests generated from the sftp/gost34.11-2012_stribog implementation

renamed GOST hash function file and fixed test file

fixed GOST Streebog hash function (test cases are successful)

two of 6 tests for GOST Streebog is successful

added first GOST hash function impl and first tests (failing)