- Allow `code_rating` check on Scrutinizer
- Exclude tests/* and vendor/* from Scrutinizer paths
- Fix Travis error when running composer
- Run `php_analyzer` on Scrutinizer
- Run `php_mess_detector` on Scrutinizer
- Run PHPUnit on Travis without using Foundation
- Run tests coverage on Scrutinizer
Also removes the unstable build badge, which is kind of redundant since
we will always respect the pattern of keeping the `master` branch stable
enough to be used.
Two Scrutinizer badges were added: code coverage and code quality.
Travis changed to report code coverage to Scrutinizer.