Altered PDF generation.

Added code to inject \appendix to the first appendix notebook
so that they are properly labelled. Started g-h chapter as chapter
one. There is probably a lot more I want to do now that I have
the basic idea of how to inject latex into the files before creating
the PDF, but this is a good start.

build_book

@@ -0,0 +1,11 @@
+#! /bin/bash
+
+echo "merging book..."
+
+python merge_book.py > Kalman_and_Bayesian_Filters_in_Python.ipynb
+
+echo "creating pdf..."
+ipython nbconvert --to latex --template book --post PDF Kalman_and_Bayesian_Filters_in_Python.ipynb
+
+echo "done."
+