Add HHVM badge
Add note about commandline installing.
Use shields.io for badges
Use shields.io for badges
Update composer oneliner
Add shields.io author badge
Update homepage url
New version of Composer can resolve version automagically

http://blog.doh.ms/2014/10/13/installing-composer-packages/
PHP does not need to be in composer.json
Apparently Travis needs PHP in composer.json?
Revert previous
Add code coverage
PSR-2 fixes