Scrutinizer-CI

I was wondering if there was any interest in using [Scrutinizer-CI](https://scrutinizer-ci.com). It's a tool that provides code quality metrics and static analysis reports. You can see it in action [here](https://scrutinizer-ci.com/g/justinbrewer/shimmie2), and its list of issues found [here](https://scrutinizer-ci.com/g/justinbrewer/shimmie2/issues/scrutinizer-config). It's relatively new so there's likely to be mistaken reports (e.g. [it screws up old-style constructors, which Shimmie still has in abundance](https://github.com/scrutinizer-ci/php-analyzer/issues/162)), but I believe it will be a valuable tool in the long run.