Added statement to check if the method given to route is a callable one.
Merge branch 'master' into basic-structure
Created base of Response class.

This class is responsible to return a response to user request
Implememted Response class in web/index.php
Removed TestController used in the first routing test
Crated base of View class
Created base of Controller class
Added Demo package using Controller and View components to show a simple welcome page.