Combining with uitable causes leading whitespace

[jtyers]

Just come across your trio of console UI libraries, they look awesome!

One bug I've found is when combining this with uitable. Here's my code:

	writer := uilive.New()
	bufferedWriter := writer.Bypass()
	writer.Start()

	for i := 0; i <= 100; i++ {
		table := uitable.New()
		table.MaxColWidth = 50

		table.AddRow("Operation", "Progress", "%%")
		table.AddRow("Downloading", fmt.Sprintf("%d/%d", i, 100), fmt.Sprintf("%d", i/100))
		table.AddRow("And another", fmt.Sprintf("%d/%d", i*2, 1000), fmt.Sprintf("%d", (i*2)/1000))

		fmt.Fprintf(bufferedWriter, table.String())
		writer.Flush()
		time.Sleep(time.Millisecond * 500)
	}

	fmt.Fprintln(writer, "Finished: Downloaded 100GB")
	writer.Stop() // flush and stop rendering

And here's some output:

                                  Operation  	Progress	%
Downloading	35/100  	0 
And another	70/1000 	0

As you can see the top row of the table is indented by spaces. Is this easy to fix? As you can see above I am using .Newline(). I did also try writing direct to writer, but that still causes the bug. If I use .Bypass() then the indent goes away but then the table is echoed many times to the terminal as it updates. Removing .Flush() makes no difference.