So far, I really like this approach. It allows us to push validation logic out of the Card class and into its own set of classes that can be more easily tested.
Fixes#75, but we've got a lot more work to do in getting this full scale
If you're living in a non-UTF-8 character set, then you can configure what quotes are smartly changed.
If my regexes are messing things up, you can also turn this off with smart_quotes: false
Also updated docs.
This closes#50
Andy Meneely