[wp-docs] Link(s) to Codex

[lorelle at cameraontheroad.com]

For those on the cutting edge of our cutting editors...these are the pages 
we have to make sure are primo:

 * http://codex.wordpress.org/Upgrade_1.2_to_1.5
* http://codex.wordpress.org/IRC
* http://codex.wordpress.org/Importing_from_other_blogging_software
* http://codex.wordpress.org/XML-RPC_Support
* http://codex.wordpress.org/Plugin_API
* http://codex.wordpress.org/Enable_Sending_Referrers
* http://codex.wordpress.org/Spam_Words
* http://codex.wordpress.org/Make_a_Directory_Writable
* http://codex.wordpress.org/Update_Services

There will probably be alink added to [[Using Themes]] soon.

With the new generated interest in the next release, I think we should add 
to that list:
http://www.codex.wordpress.org/Plugins
And everything in http://codex.wordpress.org/Getting_Started_with_WordPress

Just my two cents.

Lorelle