PHP_CodeSniffer review

See http://pear.php.net/package/PHP_CodeSniffer for more information on the program.

Uses the csv report format to easily parse the results. Default standard is PEAR, but this can easily be changed by calling `setStandard` on the review.

Use of `setStandard` can be seen in hooks/static-review-pre-commit.php, where it uses the PSR2 standard. Internally this just adds `--standard=?` to the `phpcs` command line call.