Rename: \Vision\Databaser\Mapper\PDOMapper -> \Vision\Database\AbstractPdoRepository

Additionally remove some unnecessary lines
Add: GET and POST route types

The new route types simpify routing configuration.

Old:
$route = new Route('foo', 'ControllerX');
$route->setRequirements(array('HTTP_METHOD' => 'POST'));

New:
$route = new RoutePost('foo', 'ControllerX');