[3.0.0] Add global scoping support for ExtractStyleBlocks; scoped="" attribute bumped off for some 'other' time.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1478 48356398-32a2-884e-a903-53898d9a118a

TODO

@@ -11,12 +11,6 @@ If no interest is expressed for a feature that may required a considerable
 amount of effort to implement, it may get endlessly delayed. Do not be
 afraid to cast your vote for the next feature to be implemented!
 
-3.0 release [Go PHP5!]
- - Allow extracted CSS blocks to have a bounding selector prepended to all
-   of their declarations. There are two types: a global type and a HTML5
-   scoped type. This will allow for <style> while minimizing the risk of
-   disruption of other parts of site layout,
-
 3.1 release [Error'ed]
  # Error logging for filtering/cleanup procedures
  - XSS-attempt detection
@@ -81,7 +75,6 @@ Unknown release (on a scratch-an-itch basis)
  - Abstract ChildDef_BlockQuote to work with all elements that only
    allow blocks in them, required or optional
  - Reorganize Unit Tests
- - Reorganize configuration directives (Create more namespaces! Get messy!)
  - Advanced URI filtering schemes (see docs/proposal-new-directives.txt)
  - Implement lenient <ruby> child validation
  - Explain how to use HTML Purifier in non-PHP languages / create
@@ -89,6 +82,12 @@ Unknown release (on a scratch-an-itch basis)
  - Fixes for Firefox's inability to handle COL alignment props (Bug 915)
  - Automatically add non-breaking spaces to empty table cells when
    empty-cells:show is applied to have compatibility with Internet Explorer
+ - Distinguish between default settings and explicitly set settings, so
+   configurations can be merged
+ - Nested configuration namespaces
+ - Allow scoped="scoped" attribute in <style> tags; may be troublesome
+   because regular CSS has no way of uniquely identifying nodes, so we'd
+   have to generate IDs
 
 Requested