added an option to use namespaced instances of socket.io directly#4

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Commits on Oct 11, 2017

added socket io settings in settings with key 'socket_io_settings' to customise socket.io config and allow multiplexing single socket.io instance for multiple bots
oneto018r
committed
added settings option socket_io instead of server for setting an instance of namespaced socket.io for customization
oneto018r
committed
added documentation at readme.md for new option 'socket_io'
oneto018r
committed