Make string matching non-greedy to fix parsing @font-face blocks and CSS w/o much newlines.

[roblillack]

This pull request changes the parsing of string tokens to be non-greedy. This way multiple strings in one line do not get recognized as a single string.

Two rather complex test-cases are included, too.

[thejerf]

A nice PR, thanks.

If I am reading this correctly, you should only have had this problem with apostrophe-delimited strings. The Gorilla code I pulled this from appears to have tried to simplify the string tokens (or they used an older definition?), and in the process ended up permitting apostrophes legally instead of apostrophe-delimited strings. Making this a lazy matcher resolves this slightly differently than the standard, but I believe it works correctly, by inspection.

[roblillack]

Thanks for merging.

You might also want to tag v1.0.1.

[thejerf]

Crud, I always forget that "git push" doesn't push tags on its own. I actually had. :)

[roblillack]

git config push.followTags true 👍