[fix] ixquick : fetch results from ixquick.eu instead of ixquick.com, close #727

searx/settings.yml

 
   - name : ixquick
     engine : startpage
-    base_url : 'https://www.ixquick.com/'
-    search_url : 'https://www.ixquick.com/do/search'
+    base_url : 'https://www.ixquick.eu/'
+    search_url : 'https://www.ixquick.eu/do/search'
     shortcut : iq
     timeout : 6.0
     disabled : True