[3.1.0] Further cleanup, making standalone work again

- Remove includes call in HTMLPurifier.auto.php
- Relax ConfigSchema treatment in generate-includes.php
- Clean up some empty comments (there are probably more)
- De-indent some extends
- class_exists() should now attempt to use autoload
- schema.ser is now a standalone file
- tests/index.php can be run from any directory

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1540 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/HTMLModuleManager.php

@@ -146,14 +146,14 @@ class HTMLPurifier_HTMLModuleManager
             $ok = false;
             foreach ($this->prefixes as $prefix) {
                 $module = $prefix . $original_module;
-                if ($this->_classExists($module)) {
+                if (class_exists($module)) {
                     $ok = true;
                     break;
                 }
             }
             if (!$ok) {
                 $module = $original_module;
-                if (!$this->_classExists($module)) {
+                if (!class_exists($module)) {
                     trigger_error($original_module . ' module does not exist',
                         E_USER_ERROR);
                     return;
@@ -168,15 +168,6 @@ class HTMLPurifier_HTMLModuleManager
         $this->registeredModules[$module->name] = $module;
     }
     
-    /**
-     * Safely tests for class existence without invoking __autoload in PHP5
-     * or greater.
-     * @param $name String class name to test
-     */
-    private function _classExists($name) {
-        return class_exists($name, false);
-    }
-    
     /**
      * Adds a module to the current doctype by first registering it,
      * and then tacking it on to the active doctype