Add babel mapping file for extracting the strings
Add POT template file for initializing further translations

This is how this file is generated using pybabel:
 pybabel extract -F tools/i18n/babel.cfg ./ -o IPython/html/locale/ipynotebook.pot
Add initial Turkish translation
Add compiled .mo catalogue for Turkish

Now you can test the localization effect by supplying the argument:

--NotebookApp.webapp_settings="{'language':'tr_TR'}"

to the ipython notebook.