Factor out CookieAddingHTTPRedirectHandler.

before).

Make Hackney use date registered rather than date received.

back to them once you have the cookie, you're fine...

Alter PlanningUtils to CDATA everything, scrapping the xmlquote function.

accessible with a referer.

Also adding the pycurl scraper for Westminster, just in case it is useful to remind us how to do stuff later.

The info url situation here is not really good enough. 
All we get is a page with the last 7 days apps on it with no info urls.
I'm using that page as the info url for the moment, but it will obviously
be no use after seven days...

have had to give the search url in all the info urls. Comment url works fine for each app.

Add scrapers for Merton and Conwy (PlanningExplorer)