Log Message:
Update geeklog to 2.0.0.

Here is summary from release announce.  Full changes are available in
docs/history file.  (XSS problem was already fixed by geeklog-1.8.2sr1.)

* Improved strength of password hashing
* Allow Topics to have child Topics
* Allow Articles, Blocks and other Plugin objects to be associated with more
  than one Topic
* Topic Breadcrumb support
* Emergency Rescue Tool is included with the Geeklog Install
* Added support for MySQLi
* Add Stop Forum Spam and Spam Number of Links Modules to Spam-X
* A new theme called Denim which is based on Responsive Web Design
* A new theme called Modern Curve
* Comments Form on same page as Articles and plugin other Plugin objects
* Comments RSS Feed Plugin now integrated into Geeklog
* Includes updated versions of jQuery to 1.9.1 and jQuery UI to 1.10.1
* Updated FCKeditor version to 2.6.9
* XSS fixes for the Install, Configuration, Topic Editor, Polls Plugin and
  Calendar Plugin
* Twitter OAuth API updated
* HTML 5 DOCTYPE