Updated introduction lecture.

introduction/introduction.tex

@@ -49,6 +49,15 @@
   \end{itemize}
 \end{pframe}
 
+\begin{pframe}
+  \begin{figure}[]
+    \begin{center}
+      \includegraphics[height=0.85\textheight]{project_tree}
+    \end{center}
+    \caption{``I have my own system.''}
+  \end{figure}
+\end{pframe}
+
 \subsection{Why should I use it?}
 \begin{pframe}
   For a single user: