Easier use of pollin to check for something to read on all channels of any priority

timeout : Time in milliseconds before stopping to wait for events

Property definitions

socket $ TCPStream :: ready_to_read
	# Easier use of pollin to check for something to read on all channels of any priority
	#
	# timeout : Time in milliseconds before stopping to wait for events
	fun ready_to_read(timeout: Int): Bool
	do
		var events = [new NativeSocketPollValues.pollin]
		return pollin(events, timeout).length != 0
	end
lib/socket/socket.nit:130,2--137,4