[3.1.0] The bulk of autoload support added

- Add FSTools:globr()
- require_once removed from all files
- HTMLPurifier.autoload.php added to register autoload handler
- Removed redundant chdir in maintenance script
- Modified standalone to use HTMLPurifier.includes.php for including stuff
- Added maintenance script remove-require-once.php which we used once and should never use again

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1516 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/Lexer.php

@@ -1,17 +1,5 @@
 <?php
 
-require_once 'HTMLPurifier/Token.php';
-require_once 'HTMLPurifier/Encoder.php';
-require_once 'HTMLPurifier/EntityParser.php';
-
-// implementations
-require_once 'HTMLPurifier/Lexer/DirectLex.php';
-if (version_compare(PHP_VERSION, "5", ">=")) {
-    // You can remove the if statement if you are running PHP 5 only.
-    // We ought to get the strict version to follow those rules.
-    require_once 'HTMLPurifier/Lexer/DOMLex.php';
-}
-
 HTMLPurifier_ConfigSchema::define(
     'Core', 'ConvertDocumentToFragment', true, 'bool', '
 This parameter determines whether or not the filter should convert