Fix kingston

A simple web address change broke http://www.planningalerts.org.au/authorities/kingston

However, scraperwiki is producing
```
On its last run it generated the following error: #<Errno::ENOSPC: No space left on device - /tmp/mechanize-raw20140118-4-g3zsji.lock>
```

I tweeted them about it, but consider fixed but not fully tested.

Pull request two: Now with added accuracy!