Rename img/ to fig/

Appears to be more LaTeX-y.

contents.tex

@@ -53,7 +53,7 @@ Im Wurzelverzeichnis finden Sie ein \texttt{Makefile}.
 \label{sec:figures}
 
 \begin{figure}[h]
-  \includegraphics[width=4cm]{img/the.png}
+  \includegraphics[width=4cm]{fig/the.png}
   \caption{Initial thesis draft.}%
   \label{fig:initial-draft}
 \end{figure}

hhuthesis.cls

@@ -139,9 +139,9 @@
   \raisebox{-10mm}{
     \begin{minipage}[b]{6.5cm}
       \ifprintblackwhite
-        \includegraphics[width=6.5cm]{img/hhu-logo-black}%
+        \includegraphics[width=6.5cm]{fig/hhu-logo-black}%
       \else
-        \includegraphics[width=6.5cm]{img/hhu-logo-rgb}%
+        \includegraphics[width=6.5cm]{fig/hhu-logo-rgb}%
       \fi
     \end{minipage}%
   }%