Add service generator

* Register generator on bin/console.php
* Add GeneratorServiceCommand.php & ServiceGenerator.php classes
* Add servicesAsParametersKeys funtion on Generator class
* Remove file module.services.yml.twig
* Add Twig templates services.yml.twig & services.class.php.twig
* Update template services-use-operator.php.twig passing argument
Add service generator

* Register generator on bin/console.php
* Add GeneratorServiceCommand.php & ServiceGenerator.php classes
* Add servicesAsParametersKeys funtion on Generator class
* Remove file module.services.yml.twig
* Add Twig templates services.yml.twig & services.class.php.twig
* Update template services-use-operator.php.twig passing argument
Fix merge conflicts
Merge pull request #77 from jmolivas/generate-service

Merge Generate service command