Adds `composer.json`.
Merge pull request #9 from simonwheatley/feature/composer-json

I have no idea what I'm doing.
Update composer.json
Create LICENSE
Merge branch 'master' of github.com:johnbillion/QueryMonitor
Merge branch 'develop'
Create README.md
Some screenshots
Merge branch 'develop'
First pass at a friendly readme
Update readme