Fixes for TCP connections and raw data collection.

[did-vmonroig]

I'm starting to use this bundle in a project for receiving data frames from SCADA devices. I think they're poorly designed and doesn't close TCP connections properly after a FIN is sent, leaving sockets in LAST_ACK and receiving 0 bytes in readMessages(). This is a fix for this problem.

Also, I had to remove a call to an undefined unserialize(). As I'm using plain bytes, this is OK for me.

Lastly, I've added optional cleaning of messages, as I need complete frames with some 0x0D endings in them.

[MFoster]

Overall these changes are great and much appreciated. However the Serializer is a big part of the library, you could create a serializer that returns what its given.

[did-vmonroig]

If unserialize() call is uncommented, an error is generated:

[Symfony\Component\Debug\Exception\UndefinedMethodException]
Attempted to call an undefined method named "unserialize" of class "Symfony\Component\Serializer\Serializer".
Did you mean to call e.g. "deserialize" or "serialize"?

Any idea?

[MFoster]

I'll look into it, I think it's nice to have the data come out structured instead of a string but could remove the dependency and have serialization go on outside of the socket library.

[did-vmonroig]

Thank you! Right now I'm doing some sort of deserialization but from string. Certainly would be better to do it this new way.