configuration value should be required
create environment to preload config
demonstrate input/output hooks in peridot file
include HasEventEmitterTrait
exclude php timer tests in box.json
use reporter event emitter in peridot.php
argument and option helpers on InputDefintiion
php-cs-fixer
Merge pull request #43 from brianium/feature/definition-events

Add application environment and events
add apigen.neon for specifying doc generation
update documentation
reporters no longer need runner reference
update README
exclude symfony test docs from documentation
Merge pull request #44 from brianium/feature/documentation

Add apigen.neon for API docs and improve API documentation
Merge branch 'develop' of github.com:peridot-php/peridot into develop