[3.1.0] Landed modified patch by Braden Anderson for %CSS.AllowedProperties

- Fix broken ConfigSchema build, as well as broken aliases
- Remove another advisory property from runtime ConfigSchema classes
- Reorder flush script to more accurately reflect dependencies
- Remove some aliases from unit tests

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1635 48356398-32a2-884e-a903-53898d9a118a

library/HTMLPurifier/HTMLDefinition.php

@@ -252,6 +252,7 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
             }
             // emit errors
             foreach ($allowed_elements as $element => $d) {
+                // :TODO: Is this htmlspecialchars() call really necessary?
                 $element = htmlspecialchars($element);
                 trigger_error("Element '$element' is not supported $support", E_USER_WARNING);
             }
@@ -283,6 +284,7 @@ class HTMLPurifier_HTMLDefinition extends HTMLPurifier_Definition
             // emit errors
             foreach ($allowed_attributes_mutable as $elattr => $d) {
                 list($element, $attribute) = explode('.', $elattr);
+                // :TODO: Is this htmlspecialchars() call really necessary?
                 $element = htmlspecialchars($element);
                 $attribute = htmlspecialchars($attribute);
                 if ($element == '*') {