Replace Visio implementation of hardware overview with Inkscape SVG

docs/user_guide/content/01-intro.tex

@@ -55,7 +55,7 @@ An overview of the effects of each fault model can be seen in \Cref{fig:faulttim
 \begin{figure}[ht]
 \centering
 \input{img/fault_modes.tex}
-\caption{Timing Diagrams for Fault Modes}
+\caption{Timing Diagrams of Fault Modes}
 \label{fig:faulttiming}
 \end{figure}