removed script, added README instead

lib/images/fileicons/README

+For the generator of these files see
+https://github.com/splitbrain/file-icon-generator/blob/master/example-dokuwiki.php

lib/images/fileicons/generate.php

-<?php
-
-// this is not provided by DokuWiki and needs to checked out separately from
-// https://github.com/splitbrain/file-icon-generator
-require '/home/andi/projects/fileiconbuilder/FileIconBuilder.php';
-
-if('cli' != php_sapi_name()) die('This has to be run from command line');
-if(!defined('DOKU_INC')) define('DOKU_INC', realpath(dirname(__FILE__).'/../../../').'/');
-define('NOSESSION', 1);
-require_once(DOKU_INC.'inc/init.php');
-
-$extensions = array(
-    'jpg', 'gif', 'png', 'ico',
-    'swf', 'mp3', 'ogg', 'wav', 'webm', 'ogv', 'mp4',
-    'tgz', 'tar', 'gz', 'bz2', 'zip', 'rar', '7z',
-    'pdf', 'ps',
-    'rpm', 'deb',
-    'doc', 'xls', 'ppt', 'rtf',
-    'docx', 'xlsx', 'pptx',
-    'sxw', 'sxc', 'sxi', 'sxd',
-    'odc', 'odf', 'odg', 'odi', 'odp', 'ods', 'odt',
-    'html', 'htm', 'txt', 'conf', 'xml', 'csv',
-    // these might be used in downloadable code blocks:
-    'c', 'cc', 'cpp', 'h', 'hpp', 'csh', 'diff', 'java', 'pas',
-    'pl', 'py', 'sh', 'bash', 'asm', 'htm', 'css', 'js', 'json'
-);
-
-// generate all the icons
-@mkdir('16x16');
-@mkdir('32x32');
-
-$DFIB = new FileIconBuilder();
-foreach($extensions as $ext) {
-    echo "$ext\n";
-    $DFIB->create16x16($ext,"16x16/$ext.png");
-    $DFIB->create32x32($ext,"32x32/$ext.png");
-}
-
-copy("16x16/jpg.png", "16x16/jpeg.png");
-copy("32x32/jpg.png", "32x32/jpeg.png");
-
-copy("16x16/htm.png", "16x16/html.png");
-copy("32x32/htm.png", "32x32/html.png");
-