Freeze many changes

* Implement headers and footers for export to LaTeX.
* Implement a title page for export to LaTeX.
* Improve the text in many places.
* Configure export to LaTeX using buffer local variables.

.gitignore

@@ -6,7 +6,10 @@
 *.fdb_latexmk
 *.fls
 *.html
+*.lof
 *.log
+*.lol
+*.lot
 *.out
 *.pdf
 *.py

org-babel-tangle-file

@@ -3,6 +3,7 @@
 emacs -Q --batch --eval "
 (progn
   (require 'org)
+  (require 'ob-latex)
   (defun my-org-eval-blocks-named (name)
     (when (eq major-mode 'org-mode)
       (let ((blocks