Merge pull request #5733 from jhamrick/nbformat-v4-schema

nbformat v4 draft schema

setup.py

@@ -272,12 +272,17 @@ extras_require = dict(
     doc = ['Sphinx>=1.1', 'numpydoc'],
     test = ['nose>=0.10.1'],
     terminal = [],
+    nbformat = ['jsonschema>=2.0', 'jsonpointer>=1.3'],
     notebook = ['tornado>=3.1', 'pyzmq>=2.1.11', 'jinja2'],
     nbconvert = ['pygments', 'jinja2', 'Sphinx>=0.3']
 )
+
 if sys.version_info < (3, 3):
     extras_require['test'].append('mock')
 
+extras_require['notebook'].extend(extras_require['nbformat'])
+extras_require['nbconvert'].extend(extras_require['nbformat'])
+
 everything = set()
 for deps in extras_require.values():
     everything.update(deps)