Release of v0.7.2

version 0.7.2

• Fix output buffer parameter and size for RSA decryption that could cause
  stack corruption under certain circumstances
• Set the RSA PSS salt length to the digest length rathern than max. possible
• Fixes to symmetric decrytion related to input size check,
  defer padding to the user [EVP_CIPHER_CTX_set_padding(ctx, 0)] and
  to always use a temporary malloc'ed buffer for decryption