Merge pull request #252 from dalf/master

[fix] btdigg: disable ssl check

searx/engines/btdigg.py

     params['url'] = search_url.format(search_term=quote(query),
                                       pageno=params['pageno']-1)
 
+    # FIX: SSLError: hostname 'btdigg.org'
+    # doesn't match either of 'ssl2000.cloudflare.com', 'cloudflare.com', '*.cloudflare.com'
+    params['verify'] = False
+
     return params