Extend CMS detection for Urwahl3000 theme (#96)

* Extend check for Urwahl3000 theme
* Remove unused import

checks/generator.py

@@ -3,8 +3,6 @@ Checks the 'generator' meta tag and page content properties
 to detect well-known content management systems, themes etc.
 """
 
-import logging
-
 from checks.abstract_checker import AbstractChecker
 
 class Checker(AbstractChecker):
@@ -74,7 +72,8 @@ class Checker(AbstractChecker):
         elif 'gruenes-internet.de' in page_content['content']:
             generator = 'wordpress-gruenes-internet'
 
-        elif 'Urwahl3000' in page_content['content']:
+        elif ('Urwahl3000' in page_content['content'] or
+            '/themes/urwahl3000' in page_content['content']):
             generator = 'wordpress-urwahl'
 
         elif ('josephknowsbest' in page_content['content'] or