merge from 1.6 ( html purifier lib )

git-svn-id: http://xe-core.googlecode.com/svn/branches/1.5.0@10579 201d5d3c-b55e-5fd7-737f-ddc643e51545

classes/security/htmlpurifier/extras/README

@@ -0,0 +1,32 @@
+
+HTML Purifier Extras
+    The Method Behind The Madness!
+
+The extras/ folder in HTML Purifier contains--you guessed it--extra things
+for HTML Purifier.  Specifically, these are two extra libraries called
+FSTools and ConfigSchema.  They're extra for a reason: you don't need them
+if you're using HTML Purifier for normal usage: filtering HTML.  However,
+if you're a developer, and would like to test HTML Purifier, or need to
+use one of HTML Purifier's maintenance scripts, chances are they'll need
+these libraries. Who knows: maybe you'll find them useful too!
+
+Here are the libraries:
+
+
+FSTools
+-------
+
+Short for File System Tools, this is a poor-man's object-oriented wrapper for
+the filesystem. It currently consists of two classes:
+
+- FSTools: This is a singleton that contains a manner of useful functions
+  such as recursive glob, directory removal, etc, as well as the ability
+  to call arbitrary native PHP functions through it like $FS->fopen(...).
+  This makes it a lot simpler to mock these filesystem calls for unit testing.
+
+- FSTools_File: This object represents a single file, and has almost any
+  method imaginable one would need.
+
+Check the files themselves for more information.
+
+    vim: et sw=4 sts=4