Merge pull request #282 from lresende/tornado_build

Limit tornado version (temporarily) to avoid build issues

Author: rolweber

requirements.txt

@@ -2,5 +2,5 @@ jupyter_core>=4.0
 jupyter_client>=4.2.0
 notebook>=5.0.0
 traitlets>=4.2.0
-tornado>=4.2.0
+tornado>=4.2.0,<5.0
 requests>=2.7,<3.0

setup.py

@@ -57,7 +57,7 @@
         'jupyter_client>=4.2.0',
         'notebook>=5.0.0,<6.0',
         'traitlets>=4.2.0',
-        'tornado>=4.2.0',
+        'tornado>=4.2.0,<5.0',
         'requests>=2.7,<3.0'
     ],
     classifiers=[