update to tornado 4.0 and requests 2.3.0

Shared/lib/python2.7/site-packages/ox/web/openlibrary.py

@@ -6,3 +6,27 @@ def find(query):
     print url
     data = json.loads(read_url(url))
     return data
+
+def authors_ol(authors):
+    r = []
+    for a in authors:
+        url = 'http://openlibrary.org%s.json' % a
+        data = json.loads(read_url(url))
+        r.append(data['name'])
+    return r
+
+def get_data(isbn):
+    data = {}
+    ol = find(isbn)
+    if ol['docs']:
+        d = ol['docs'][0]
+        data['title'] = d['title']
+        data['author'] = authors_ol(d['authors'])
+        data['work'] = d['key']
+        data['edition'] =  d['edition_key'][0]
+        url = 'https://openlibrary.org/books/%s.json' % data['edition']
+        info = json.load(read_url(url))
+        data['pages'] = info['number_of_pages']
+        if 'dewey_decimal_class' in info: 
+            data['classification'] = info['dewey_decimal_class'][0]
+    return data