[enh] py3 compatibility

searx/engines/kickass.py

@@ -10,12 +10,11 @@
  @parse       url, title, content, seed, leech, magnetlink
 """
 
-from urlparse import urljoin
-from urllib import quote
 from lxml import html
 from operator import itemgetter
 from searx.engines.xpath import extract_text
 from searx.utils import get_torrent_size, convert_str_to_int
+from searx.url_utils import quote, urljoin
 
 # engine dependent config
 categories = ['videos', 'music', 'files']