add missing base_url to template
add missing base_url to template

original-commit-id: 14f4ca71ae573d995542149a25c70d32852149ab
original-commit-url: https://github.com/ipython-contrib/IPython-notebook-extensions/commit/14f4ca71ae573d995542149a25c70d32852149ab

jcb91/jupyter_nbextensions_configurator,jcb91/jupyter_nbextensions_configurator,jcb91/jupyter_nbextensions_configurator,jcb91/jupyter_nbextensions_configurator