Wheat Sourdough - dough strength (#29)

* tmp commit

* Spelling mistakes fix

* Fix display

* Improve text

* Add kneading flowchart

* Improve sentence. Thanks Any_Key

* Improve chart based on feedback, add references

* Cleanup + add references

* use tikzpicture for charts

* Replace image with chart

* Add image and table

* Add dough development charts

* Update readme

book/intro/acknowledgements.tex

@@ -1,13 +1,23 @@
-This book would not have been possible without the help of the community.
-Because of the donations received, I have been able to take time off from
-my job and from YouTube to write it. By providing this information free
-of charge, we can help more people around the world bake delicious sourdough
-bread at home. Thank you very much!\\
+This book would not have been possible without your help.
+
+With all your donations I have been able to take time off from my job and
+focus on this project.
+
+Furthermore many of you have contributed and improved the
+instructions, fixed spelling mistakes and/or provided
+feedback on the content. Each of you has made this book
+better.
+
+By providing this book free of charge,
+we can enable more people around the world to bake delicious sourdough
+bread at home.
+
+Thank you very much for your support!\\
 
 \begin{filecontents}{supporters.csv}
   \end{filecontents}
 
-  {\large All supporters, sorted by name:}
+  {\large Big shout-out to all the initial supporters:}
 
   \pgfplotstableset{
   begin table=\begin{longtable},