add missing methods in src/Repositories/H5PEditorStorageRepository.php

[qunabu]

see src/Repositories/H5PEditorStorageRepository.php

there are some methods that are missing implementation like

/**
     * Alter styles and scripts
     *
     * @param array $files
     *  List of files as objects with path and version as properties
     * @param array $libraries
     *  List of libraries indexed by machineName with objects as values. The objects
     *  have majorVersion and minorVersion as properties.
     */
    public function alterLibraryFiles(&$files, $libraries)
    {
    }
    /**
     * Saves a file or moves it temporarily. This is often necessary in order to
     * validate and store uploaded or fetched H5Ps.
     *
     * @param string $data Uri of data that should be saved as a temporary file
     * @param boolean $move_file Can be set to TRUE to move the data instead of saving it
     *
     * @return bool|object Returns false if saving failed or the path to the file
     *  if saving succeeded
     */
    public static function saveFileTemporarily($data, $move_file)
    {
    }
  /**
     * Clean up temporary files
     *
     * @param string $filePath Path to file or directory
     */
    public static function removeTemporarilySavedFiles($filePath)
    {
        // TODO implement this 
    }