Make each chapter introduction stand out (#179)

* Add bibliography to the ToC

* Add a list of tables at the end of the document

It needed shorter description that would fit.

* Add list of figures

* Add table of figures

* Fix a typo in short figure description

* Make each chapter introduction stand out

Not written for each chapter yet, but checking if that is something we
want.

* Increase numwidth in list of figures

Prevents over-run of figure number and text

* Use semibold in chapters intro

Looks like a good compromise for now.

* Add comments

* Add color coding to flow charts

This will hopefully allow easier reading by identifying start and end
point more easily

book/sourdough-starter/sourdough-starter-types.tex

@@ -1,6 +1,8 @@
+\begin{quoting}
 In this chapter of the book we will have a closer look
 at different sourdough starter types and their respective
 traits.
+\end{quoting}
 
 \begin{table}[htp!]
     \begin{center}

book/sourdough-starter/sourdough-starter.tex

@@ -1,3 +1,4 @@
+\begin{quoting}
 In this chapter you will learn how to make your
 own sourdough starter. Before doing so you will
 quickly learn about baker's math. Don't worry,
@@ -7,6 +8,7 @@ of it you will want to write every recipe this way.
 You will learn to understand the signs to determine
 your starter's readiness. Furthermore you will
 also learn how to prepare your starter for long-term storage.
+\end{quoting}
 
 \section{Baker's math}%
 \label{section:bakers-math}