Wrap content if too long

[rakoo]

Continuation of #20 on v0.2-dev.

This was surprisingly straightforward. And, indeed, having the view automatically redraw on resize is wonderful.

Minor caveat: if the prefix is itself bigger than the width of the view, it is not wrapped... which I consider to be ok (this case shouldn't happen that often)

[rakoo]

Note: I removed x >=0 and y >=0 because it's always true.

[jroimartin]

Applied. I fixed a couple of minor bugs:

• The first character of the new lines was not printed.
• maxY needed to be controlled.

Thank you very much for your contribution! :)

[rakoo]

Nice !