Setup for scrutinizer ci.
Add poser.pugx.org composer badges.
Merge pull request #21 from nubs/scrutinizer

Scrutinizer
Don't use --strict - a couple of our tests fail.
Merge pull request #24 from nubs/scrutinizer

Don't use --strict - a couple of our tests fail.
Add contributing guidelines.
Merge pull request #25 from nubs/master

Update contributing guidelines