Update default.latex...

templates/default.latex

@@ -276,11 +276,12 @@ $endif$
     \caption{#3}
   \end{figure}
 }
-\newcommand{\cimg}[3]{% \img{path}{settings}{caption}
+\newcommand{\cimg}[4]{% \img{path}{settings}{caption}{source}
   \begin{figure}
     \centering
     \includegraphics[#2]{#1}
     \caption{#3}
+    \caption*{\textit{#4}}
   \end{figure}
 }