Added missing CC (BY) logos.

template/acsthesis.cls

@@ -200,11 +200,11 @@
         \end{minipage}
         \begin{minipage}{0.025\textwidth}
                 \vspace{-0.75mm}
-            	\includegraphics[width=4mm, keepaspectratio]{template/images/cc_logo.pdf}
+            	\includegraphics[width=4mm, keepaspectratio]{template/images/cc.png}
         \end{minipage}
         \begin{minipage}{0.030\textwidth}
                 \vspace{-0.75mm}
-            	\includegraphics[width=4mm, keepaspectratio]{template/images/cc_attribution.pdf}
+            	\includegraphics[width=4mm, keepaspectratio]{template/images/by.png}
         \end{minipage}
         \begin{minipage}{0.73\textwidth}
             \textbf{Creative Commons Attribution 4.0 International (CC BY 4.0)}.