[2.0.1] DefinitionCache related bug-fixes

- Fixed bug where manually modified definitions were not saved via cache (mostly harmless, except for the fact that it would be a little slower)
- Configuration objects with different serials do not clobber each others when revision numbers are unequal
. DefinitionCache keys reordered to reflect precedence: version number, hash, then revision number

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1204 48356398-32a2-884e-a903-53898d9a118a

tests/HTMLPurifier/ConfigTest.php

@@ -252,9 +252,10 @@ class HTMLPurifier_ConfigTest extends UnitTestCase
         
         // test retrieval of raw definition
         $config->set('HTML', 'DefinitionID', 'HTMLPurifier_ConfigTest->test_getHTMLDefinition()');
+        $config->set('HTML', 'DefinitionRev', 3);
         $def =& $config->getHTMLDefinition(true);
         $this->assertNotEqual($def, $def2);
-        $this->assertFalse($def->setup);
+        $this->assertEqual(false, $def->setup);
         
         // auto initialization
         $config->getHTMLDefinition();