Disable interactive plots for PDF.

nbconvert cannot output interactive plots to PDF. I wrote code
to remove all of the %matplotlib notebook magic, rerun the notebooks,
and then create the PDF.

pdf/run_notebooks.bat

@@ -0,0 +1,10 @@
+mkdir tmp
+REM copy ..\*.ipynb .\tmp
+REM copy ..\*.py .\tmp
+REM cp -r ..\code\ .\tmp\code\
+
+cd tmp
+
+REM forfiles /m *.ipynb /c "cmd /c ipython ..\rm_notebook.py @file"
+REM forfiles /m *.ipynb /c "cmd /c jupyter nbconvert --to notebook --execute @file --output @file"
+