[SocketClent] Connector::create() should return a Connection instance and provide getRemoteAddress()

[clue]

Connector::create() currently creates a Stream instance with no access to the remote address. When connecting to hostnames instead of IP addresses the target remote address is particularly useful.

Instead, it should return a React\Stream\Connection instance with implements the ConnectionInterface in order to provide a getRemoteAddress() method.

While this change is quite simple, it has a couple of drawbacks:

• Is it accepted practice to create additional dependencies between react's sub-packages?
• Connection currently uses stream_socket_recvfrom() which bypasses stream wrappers (in particular SSL streams won't be decrypted anymore). Maybe this should be handled in a separate ticket anyway? (Also considering Alternate Scheme Support for Client bergie/dnode-php#24 here...)

[igorw]

We want to merge SocketClient with Socket and have either Socket\Client\Connection or a common Socket\Connection.

[clue]

We want to merge SocketClient with Socket and have either Socket\Client\Connection or a common Socket\Connection.

See #215

[…] it should return a React\Stream\Connection instance with implements the ConnectionInterface in order to provide a getRemoteAddress() method.

See reactphp-legacy/socket-client#44