add param comments
update routing

application/config/routing.php
- default controller and 404 controller are now defined separately from
the “routes” option

system/noname/Noname/Routing/Router.php
- Updated process() method to use default controller when route is empty
- Updated process() method to use 404 controller when the route does
not resolve to an existing/valid controller
- Removed error404 method
- Added setDefaultController(), getDefaultController(),
set404Controller(), and get404Controller()
- Updates/changed some comments
minor update

- added 404 status code
- added comments
add comments
update head comment and format code