remove jsonschema and jsonpointer from external

add them as nbformat dependencies

.travis.yml

@@ -14,7 +14,7 b' before_install:'
     - time sudo add-apt-repository -y ppa:pcarrier/ppa
     - time sudo apt-get update
     - time sudo apt-get install pandoc casperjs nodejs libzmq3-dev
-    - time pip install -f https://nipy.bic.berkeley.edu/wheelhouse/travis jinja2 sphinx pygments tornado requests mock pyzmq
+    - time pip install -f https://nipy.bic.berkeley.edu/wheelhouse/travis jinja2 sphinx pygments tornado requests mock pyzmq jsonschema jsonpointer
 install:
     - time python setup.py install -q 
 script:

IPython/nbformat/validator.py

@@ -2,8 +2,8 b' from __future__ import print_function'
 import json
 import os
 
-from IPython.external.jsonschema import Draft3Validator, SchemaError
-import IPython.external.jsonpointer as jsonpointer
+from jsonschema import Draft4Validator, SchemaError
+import jsonpointer as jsonpointer
 from IPython.utils.py3compat import iteritems
 
 

setup.py

@@ -272,12 +272,17 b' 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)