add plots for g0sq with second lines as suggested by Patrick

talk.tex

@@ -57,7 +57,7 @@
 		\item massive $\Rightarrow$ at $N_{\rm f}=3$ symmetric point
 		\vspace{.5cm}
 		\item needed for improv. quark current mass
-		\item decay constants & matrix elements
+		\item decay constants \& matrix elements
 		% \item masses of mesons (e.g. $\chi_\mathrm{c1}$ or $D_\mathrm{1}^\ast$)
 		\pause
 		\vspace{.5cm}