StopWordsKorean class bug (codelucas#540)

* bug fix: StopWordsKorean class

fixed bug in StopWordsKorean class that original code did not find stopwords in words.
StopWordsHindi class also seems like having the same problem but did not fix it.

* enhancement: finding Korean stopwords

Korean is composed of 'noun'+'postposition'.
Postposition acts like stopwords in English.
For example, to him' is '그에게'(그(he)+에게(to)) in Korean. 에게(to) is a stopword.
So, we can detect stopwords mostly by checking whether the last characters in Korean words is stopwords.

Author: yongja216

newspaper/text.py

@@ -149,8 +149,9 @@ def get_stopword_count(self, content):
         c = 0
         for w in candidate_words:
             c += 1
-            for stop_word in self.STOP_WORDS:
-                overlapping_stopwords.append(stop_word)
+            for s in self.STOP_WORDS:
+                if w.endswith(s):
+                    overlapping_stopwords.append(w)
 
         ws.set_word_count(c)
         ws.set_stopword_count(len(overlapping_stopwords))