title: stop words removal not working correctly
body: <p>Any idea why stop words removing is not working correctly? It is replacing stuff wrongly and sometimes replaces say a with an or can't consider <code>it's</code> as a single word.</p>
  
  <pre><code>stop_words=open("stopwords.txt")
  stop_words=stop_words.read().split("\n")
  print stop_words
  for line in splitted_tweets:
      #print line
      #print "***************************************"
      if (line.__contains__("text='")):
          start_index=line.index("text='")+6
          end_index=line.index("',", start_index)
          tweet=line[start_index:end_index]
          print tweet
          print "**********"
          tweet_words = re.sub("[^\w]", " " , tweet).split()
          print tweet_words
          for word in stop_words:
                  if word in tweet_words:
                          print word
                          tweet=tweet.replace(word, "")
  
          print "?????????????????????????"
          print tweet
  </code></pre>
  
  <p>Here's some example output:</p>
  
  <pre><code>['RT', 'sayingsforgirls', 'Do', 'not', 'touch', 'MY', 'iPhone', 'It', 's', 'not', 'an', 'usPhone', 'it', 's', 'not', 'a', 'wePhone', 'it', 's', 'not', 'an', 'ourPhone', 'it', 's', 'an', 'iPhone']
  a
  an
  it
  not
  ?????????????????????????
  RT @syingsforgirls: Do  touch MY iPhone. It's  n usPhone, 's   wePhone, 's  n ourPhone, 's n iPhone.
  Do not touch MY iPhone. It's not an usPhone, it's not a wePhone, it's not an ourPhone, it's an iPhone.
  **********
  ['Do', 'not', 'touch', 'MY', 'iPhone', 'It', 's', 'not', 'an', 'usPhone', 'it', 's', 'not', 'a', 'wePhone', 'it', 's', 'not', 'an', 'ourPhone', 'it', 's', 'an', 'iPhone']
  a
  an
  it
  not
  ?????????????????????????
  Do  touch MY iPhone. It's  n usPhone, 's   wePhone, 's  n ourPhone, 's n iPhone.
  RT @BrianaaSymonee: she says imma dog, but it takes one to know one...
  **********
  ['RT', 'BrianaaSymonee', 'she', 'says', 'imma', 'dog', 'but', 'it', 'takes', 'one', 'to', 'know', 'one']
  but
  it
  she
  to
  ?????????????????????????
  RT @BrianaaSymonee:  says imma dog,   takes one  know one...
  she says imma dog, but it takes one to know one...
  **********
  </code></pre>