Fix duplicate flowchart (#222)

* Fix duplicate flowchart

This combines both flowcharts into one

* Start on pink for starter readiness flowchart

* Add braces to TikZ flowcharts

* Rewired flowchart with right-angled transitions

* Change Arrows from right-angled to star connected

As I could not really find a way not to have diagonal arrows... I
decided to embrace it instead.  YMMV

* Homogenize box sizes

* Align on unit inside the flowchart node

* Fix code typo in starter readiness flowchart

* Create a MWE showing (known) ebook issues

Those issues are:
- Temp in flowchart
- No front image
- Chemical formula
- No list of flowcharts
- Weird looking table

Also test fonts, accents, etc.. seems ok.

* Make ebook the default target

* Revert "Create a MWE showing (known) ebook issues"

This reverts commit dac7f8f21d.

* Revert "Make ebook the default target"

This reverts commit e92e464459.

---------

Co-authored-by: Ced <ced@sdf.org>

book/wheat-sourdough/wheat-sourdough.tex

@@ -100,7 +100,7 @@ main dough.
 
 \begin{flowchart}[!htb]
 \begin{center}
-  \input{figures/fig-wheat-sourdough-starter-process.tex}
+  \input{figures/fig-starter-readiness.tex}
   \caption[Process to prepare your starter before baking]{The process to check
       your sourdough starter when making wheat-based doughs. In practice
       I~frequently use a stiff sourdough starter. The stiff starter features
@@ -1114,7 +1114,7 @@ batch. It is optional if you are making a single loaf.
 \begin{flowchart}[!htb]
 \begin{center}
   \input{figures/fig-dividing-preshaping.tex}
-  \caption[Dividing decision tree]{Dividing is only required when you are
+  \caption[Is dividing your dough required check]{Dividing is only required when you are
       making multiple loaves in a single dough batch.}%
   \label{fig:dividing-decision-tree}
 \end{center}
@@ -1229,7 +1229,7 @@ your environment.
 \begin{flowchart}[!htb]
 \begin{center}
   \input{figures/fig-shaping-process.tex}
-  \caption[Shaping process]{A schematic visualization of the shaping process
+  \caption[Sourdough shaping process]{A schematic visualization of the shaping process
       including checks for an overfermented dough.}%
   \label{fig:shaping-decision-tree}
 \end{center}
@@ -1454,7 +1454,7 @@ of retarding and flavor development.
 \begin{flowchart}[!htb]
 \begin{center}
   \input{figures/fig-proofing-process.tex}
-  \caption[Proofing process]{A schematic overview of the different steps of
+  \caption[Sourdough proofing process]{A schematic overview of the different steps of
       the sourdough proofing process. The proofing technique to choose depends
       on your availability and schedule.}%
   \label{fig:proofing-process}