add query parameter support
add test for query parameter
Merge branch 'query-parameter' of github.com:mallowlabs/ruby-socket.io-client-simple into mallowlabs-query-parameter
fix code  #5
fix query-parameter test  #5
use 2nd argment of method "SocketIO::Client::Simple.connect" as handshake query parameter  #5
update README, connect params  #5