[fix] autocomplete unicode issue - closes #808

searx/autocomplete.py

             engine_query = full_query.getSearchQuery()[1:]
 
             for lc in language_codes:
-                lang_id, lang_name, country, english_name = map(str.lower, lc)
+                lang_id, lang_name, country, english_name = map(unicode.lower, lc)
 
                 # check if query starts with language-id
                 if lang_id.startswith(engine_query):
                     if len(engine_query) <= 2:
-                        results.append(':{lang_id}'.format(lang_id=lang_id.split('-')[0]))
+                        results.append(u':{lang_id}'.format(lang_id=lang_id.split('-')[0]))
                     else:
-                        results.append(':{lang_id}'.format(lang_id=lang_id))
+                        results.append(u':{lang_id}'.format(lang_id=lang_id))
 
                 # check if query starts with language name
                 if lang_name.startswith(engine_query) or english_name.startswith(engine_query):
-                    results.append(':{lang_name}'.format(lang_name=lang_name))
+                    results.append(u':{lang_name}'.format(lang_name=lang_name))
 
                 # check if query starts with country
                 if country.startswith(engine_query.replace('_', ' ')):
-                    results.append(':{country}'.format(country=country.replace(' ', '_')))
+                    results.append(u':{country}'.format(country=country.replace(' ', '_')))
 
     # remove duplicates
     result_set = set(results)