[fix] fix kickass engine

thanks @Cqoicebordel in #144:
https://github.com/asciimoo/searx/pull/144#issuecomment-67036903

searx/engines/kickass.py

     params['url'] = search_url.format(search_term=quote(query),
                                       pageno=params['pageno'])
 
+    # FIX: SSLError: hostname 'kickass.so' doesn't match either of '*.kickass.to', 'kickass.to'
+    params['verify'] = False
+
     return params
 
 

searx/search.py

 # get default reqest parameter
 def default_request_params():
     return {
-        'method': 'GET', 'headers': {}, 'data': {}, 'url': '', 'cookies': {}}
+        'method': 'GET', 'headers': {}, 'data': {}, 'url': '', 'cookies': {}, 'verify': True}
 
 
 # create a callback wrapper for the search engine results
                 headers=request_params['headers'],
                 hooks=dict(response=callback),
                 cookies=request_params['cookies'],
-                timeout=engine.timeout
+                timeout=engine.timeout,
+                verify=request_params['verify']
             )
 
             # specific type of request (GET or POST)