A line is now recognized as "all caps" if it has only capital letters and/or punctuation and/or numbers.

Previously, a line would only be recognized as "all caps" if it had only capital letters and punctuation. Therefore, it wouldn't title-case something like "HELLO WORLD 2013".
Merge pull request #1 from t-evans/master

A line is now recognized as "all caps" if it has only capital letters and/or punctuation and/or numbers.