Rewrites for orthogonal version of eqns

The changes in the univariate chapter, where I derived the
eqn for K continue to ripple through the chapters.

pdf/build_book

@@ -1,7 +1,7 @@
 #! /bin/bash
 
 #echo "merging book..."
-python merge_book.py
+ipython merge_book.py
 
 echo "creating pdf..."
 ipython nbconvert --to latex --template book book.ipynb

pdf/build_book.bat

@@ -1,4 +1,4 @@
-python merge_book.py
+ipython merge_book.py
 
 ipython nbconvert --to latex --template book book.ipynb
 ipython to_pdf.py

pdf/merge_book.py

@@ -49,6 +49,5 @@ if __name__ == '__main__':
          '../14-Adaptive-Filtering.ipynb',
          '../Appendix-A-Installation.ipynb',
          '../Appendix-B-Symbols-and-Notations.ipynb',
-         #'../Appendix-C-Walking-Through-KF-Code.ipynb',
          '../Appendix-D-HInfinity-Filters.ipynb',
          '../Appendix-E-Ensemble-Kalman-Filters.ipynb'])