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*Release date: ??-Oct-2013*
- Add HMAC_CTX_copy() function for OpenSSL < 1.0 to the C backend. This
should fix Mac OS X support.
- Ship benchmark and tox.ini
- Call OpenSSL_add_all_digests() to adds all digest algorithms.
- Add OPENSSL_VERSION and OPENSSL_API_VERSION attributes for debugging.
- Issue 1: Load libcrypto error strings with ERR_load_crypto_strings()
and make sure lib, func and reason are set.
- Add self-tests for the accelerated C module to cover miscompiles and
linking issues.