Update geeklog package to 1.7.0.

Quote from release announce:

This release adds support for PostgreSQL (in addition to MySQL and MS
SQL), developed by Stan Palatnik during the Google Summer of Code
2009. It also adds a re-authentication option in case the CSRF token
expires, thus preventing loss of data. For other improvements, please
see the list of changes. Of course, it also addresses the latest
security issue.

We would also like to thank all those students again who applied for
the Google Summer of Code 2010 and submitted patches for Geeklog. Some
of them already made it into 1.7.0, the rest is scheduled for
inclusion into Geeklog 1.7.1. We will also be looking into adding more
of our successful GSoC projects from 2009 into that release.

(taca)