Cleaner message on installing composer
Add more options to phpunit based on Symfony and Silex

Symfony: https://github.com/symfony/symfony/blob/master/phpunit.xml.dist
Silex: https://github.com/fabpot/Silex/blob/master/phpunit.xml.dist
Move from Models to Model
Merge pull request #12 from jrschumacher/enhance-tests

Enhance tests