Updated the .gitignore to add .ropeproject/ folder
Added a partial support of the XEP 0065 - Socks5 Bytestreams
Used the namespace in all stanzas
Registered stanza plugin in the stanza module
Added some comments to the get_network_address method
Renamed the _handle_on_recv to the on_recv method.
Renamed requester_thread and target_thread to proxy. The send method is now simpler.
The xep_0065 plugin supports now multiple stream (multiple connected
sockets).

To send data over a stream, we need to pass the SID in order to
retrieve the good proxy thread (and so, the good socket).
Changed the description of the xep_0065 plugin
Improved the close of the proxy thread (and the socket) in the xep_0065 plugin.
Sent a socks_closed when the socket is closed in the xep_0065 plugin.
Added the Socksipy module in the thirdparty of SleekXMPP.
Updated the LICENSE file with the license of the Socksipy
module (New-BSD).
Fixed the callback names of the xep_0065:
In-Band bytestreams -> Socks5 bytestreams
Added a top level field to the xep_0065 class:
name = 'xep_0065'
Renamed Query to Socks5 in the xep_0065.
Renamed the 'q' plugin_attrib of the Socks5 stanza to 'socks'.
Added the SID in the socks_recv xmpp event in the xep_0065 plugin.
Added the get_socket(sid) method to the xep_0065 plugin to retrieve
the socket of the Proxy thread.
Merge pull request #169 from SeyZ/develop

xep_0065 plugin (Socks5 Bytestreams)
Ensure that all SSL cert error handling is overridable using event handlers.

Relevant events:

    ssl_invalid_cert
    ssl_invalid_chain
    ssl_expired_cert
Added the xep_0065 plugin in the setup.py
Fix SSL handshake handling when not using legacy SSL.

Fixes issue #172