Apostrophe contractions are not recognized

[wxtim]

Hi

I'm getting errors because spelling sees apostrophes as word breaks, even when they are used as contractions. "you've", "could've" and "don't" should all be valid, but aren't/

[dhellmann]

The discussion on #126 will probably be useful to understand what's going on. I'm going to close this ticket as a duplicate of that one, so please post any follow-up questions or comments over there.