Render the book in PDF using pandoc and LaTeX. (#126)

* Render the book in PDF using `pandoc` and LaTeX.

* Fix installs.

* Go the apt-get route

* Another attempt

* Avoid installing twice.

* Re-order.

* Add more packages.

* Minimise deps. Fix link checker.

* Missing package.

* Missing package.

* Missing package.

* More packages.

* Missing package.

* Missing package.

* More packages...

* Remove.

* Fix link checker.

* Fix link checker.

* Fix path.

* Add subtitle.

* Avoid running over the right margin.

* Avoid running over the right margin.

* Formatting

book/src/07_threads/02_static.md

@@ -11,9 +11,9 @@ error[E0597]: `v` does not live long enough
 ...
 15 |     let right = &v[split_point..];
    |                  ^ borrowed value does not live long enough
-16 |     let left_handle = thread::spawn(move || left.iter().sum::<i32>());
-   |                        ------------------------------------------------ 
-                          argument requires that `v` is borrowed for `'static`
+16 |     let left_handle = spawn(move || left.iter().sum::<i32>());
+   |                             -------------------------------- 
+                     argument requires that `v` is borrowed for `'static`
 19 | }
    |  - `v` dropped here while still borrowed
 ```