Log Message:
Update geeklog to 1.8.0.

Quote from release announce:

With Geeklog 1.8.0 we have raised the minimum system requirement for PHP.
PHP version 5.2.0 or greater is now required.

There are a number of new features with this version of Geeklog. These
include:

- Improved Configuration, which was the Google Summer of Code project of
  Akeda Bagus from 2010. Improvements include the ability to search for
  configuration attributes, tabs, input validation as well as an updated
  look.
- OAuth Support, allowing users to log into a Geeklog site with their
  Facebook, Twitter, or LinkedIn account, developed by Hiroshi Sakuramoto of
  Geeklog Japan.
- Includes jQuery 1.5.2 and jQuery UI 1.8.11
- Updated Professional theme with new icons and tooltips.
- Reworked Plugin Admin interface that now checks for dependencies when a
  plugin is installed.