Add PHP version requirement in changelog
Mvc: Remove property $action

Property $action is used to transfer data between getOutputXxx() method, after
change, transfer by method param is more flexible.
Mvc: Change param $methodPrefix to class property
Base: New ServiceContainerInterface
Model/Workflow: New class AbstractWorkflow
Mvc: Define module and action parameter name as property
Mvc: Add lost define of property $pathToRoot
Model/Workflow: New class AbstractWorkflowView