Update documentation.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@319 48356398-32a2-884e-a903-53898d9a118a

TODO

@@ -3,23 +3,32 @@ Todo List
 Core:
  - Finish table and shorthand CSS attributes
     - border-collapse, caption-side, empty-cells, table-layout, vertical-align
-    - background
+    - background (and friends)
     - border, border-*
     - font
     - list-style
  - Implement all non-essential attribute transforms
  - Microsoft Word HTML cleaning
  - Plugins for major CMSes
+ - Rewrite *Definition and Config relationship, add various "levels" of cleaning
+ - Support other character encodings out-of-the-box
+ - Allow strict HTML 4.01, loose HTML 4.01 and strict XHTML 1.0 output
 
 Code issues:
  - Massive profiling, make it faster!
  - Make URI validation routines tighter (especially mailto)
  - Distinguish between different types of URIs, for instance, a mailto URI
    in IMG SRC is nonsensical
- - Factor out Host validation to its own AttrDef
- - Rewrite table's child definition
- - Silently drop content inbetween SCRIPT tags
+ - Rewrite table's child definition to be faster, smart, and regexp free
+ - Silently drop content inbetween SCRIPT tags (can be generalized to allow
+   specification of elements that, when detected as foreign, trigger removal
+   of children, although unbalanced tags could wreck havoc (or at least delete
+   the rest of the document).
 
 Enhancements:
- - Do fixes for Firefox's inability to handle COL alignment props (Bug 915)
- - Pretty-printing HTML
+ - Fixes for Firefox's inability to handle COL alignment props (Bug 915)
+ - Pretty-printing HTML
+ - Hooks for adding custom processors to custom namespaced tags and attributes,
+   offer default implementation
+ - Auto-paragraphing (be sure to leverage fact that we know when things
+   shouldn't be paragraphed, such as lists and tables).