Improved CloudFlare detection, added Zope

Wappalyzer now detects the Zope webserver (zope.org - often used with Plone), and it detects CloudFlare even if just a single external ressource (.css, for example, or an image) is fetched from the CloudFlare CDN.
(added Zope logo)
Removed the new CloudFlare cookie detection

...because it wouldn't actually change anything
removed a typo - must have happened when I did a quick search for "cloudflare"

sorry. :-/
Merge pull request #359 from ToBeFree/patch-1

Improved CloudFlare detection, added Zope