Fix slim hhvm fortunes, some cleanup, and a little enhancement

[herloct]

• Fix Missing Tests #2178: Add charset=utf8 to PDO DSN, so HHVM could show japanese characters.
• Cleanup: Add some whitespace for better readability.
• Enchancement: Move UPDATE prepared statement outside of loop.

cc @knewmanTE

[ashawnbandy-te-tfb]

Just wanted to apologize for the delay in reviewing this and merging it in; we're in the thick of preparing everything for our Round 13 release. As soon as Round 13 is over, we'll get to the Round 14 pull requests!

[herloct]

@ashawnbandy-te-tfb Thanks
But i'm not really sure if my PR were right.
Since TFB installation on my vagrant seems failed, it always asking for password (database, etc) when running the test.
So this PR only tested by using travis-ci, but it pass.

[knewmanTE]

@herloct Thanks for the pull request! I ran the slim, slim-hhvm, and slim-php5 tests locally and they all passed, so I'll merge this in!