Glossary (#258)

* Glossary

This adds a glossary with common terms to the book

* Apply ordering changes

* Add PR feedback

* Move to backmatter

book/sourdough.sty

@@ -28,6 +28,9 @@
 \newcommand{\ie}{\emph{i.e.}\@ifnextchar.{\!\@gobble}{}}
 \newcommand{\eg}{\emph{e.g.}\@ifnextchar.{\!\@gobble}{}}
 
+% Consistent pH values
+\newcommand{\pHvalue}[1]{pH~\SI{#1}{}}
+
 % For tables
 \renewcommand\theadfont{\bfseries}