update base box with PHP FPM

 On branch master

	modified:   docs/create-devbox.md
	modified:   virtual_machines/devbox/application_dependencies.sh
	deleted:    virtual_machines/devbox/init_d_nginx
	new file:   virtual_machines/devbox/pool-d-default_nginx.conf
	new file:   virtual_machines/devbox/sites-available-default.conf
	modified:   virtual_machines/devbox/system_dependencies.sh