function onDir2( error, files ) {
	if ( error ) {
		debug( 'Encountered an error when attempting to read directory contents: %s', error.message );
		throw error;
	}
	debug( 'Successfully read directory contents: %s', files.join( ' ' ) );
	findJSON( files );
	findData( files );
}
Callback invoked upon reading the contents of a directory.

@private
@param {(Error|null)} error - error object
@param {StringArray} files - directory contents