Add routing

Some changes related to https://github.com/owncloud/core/pull/10522 generated with the following script:

```php
<?php

$app =  $argv[1];

$routableFolders = array(
    'ajax'
);

foreach($routableFolders as $folder) {
    $scannedDirectory = scandir('./'.$app.'/'.$folder);
    $scannedDirectory = array_diff($scannedDirectory, array('.', '..'));

    foreach($scannedDirectory as $file) {
        $fileWithoutExtension = substr($file, 0, -4);
        echo('$this->create(\''.$app.'_'.$folder.'_'.$fileWithoutExtension.'\', \''.$folder.'/'.$file.'\')'."\n");
        echo("\t".'->actionInclude(\''.$app.'/'.$folder.'/'.$file.'\');');
        echo("\n");
    }
}
```