Move BinaryTokenizer, Ssl::HandshakeParser and Ssl::Rfc5246::* classes to

Move BinaryTokenizer, Ssl::HandshakeParser and Ssl::Rfc5246::* classes to
their own *.cc,*.h files

-Move the BinaryTokenizer from ssl/bio.* files to parser/BinaryTokenizer.{cc,h}
-Move the Ssl::Handshake and related structures and declarations from ssl/bio.*
 to security/Handshake.{c,h}, and under the   Security namespace
 (Security::Handshake)
-Move the Ssl::Rfc5246::* classes from ssl/bio.* to security/Handshake.{c,h},
 under the Security namespace.