Remove centering for floats (#364)

This was a bad idea...:
https://tex.stackexchange.com/questions/2651/should-i-use-center-or-centering-for-figures-and-tables

floatrows not sure how it should work with flowcharts... so we use
centring

I don't want to redefine all floats either as we use them for chapters
title page.

book/storing-bread/storing-bread.tex

@@ -9,12 +9,11 @@ later time.
 A summary can be found in Table~\ref{table:bread-storage}, with details and
 explanation in th rest of this chapter.
 \begin{table}[!htb]
-    \begin{center}
+    \centering
         \input{tables/table-storing-bread-overview.tex}
         \caption[Options to store bread]{A table visualizing the advantages
             and disadvantages of different bread storing options.}%
         \label{table:bread-storage}
-    \end{center}
 \end{table}
 
 \section{Room temperature}