Add optional presentation

{{cookiecutter.paper_repo_name}}/_optional_files/_presentation/presentation.tex

@@ -0,0 +1,15 @@
+\documentclass{beamer}
+
+\title{ {{cookiecutter.paper_title}} }
+%\subtitle{Using Beamer}
+\author{ {{cookiecutter.main_contributor_name}} }
+\institute{INSERT INSTITUTE}
+\date{INSERT DATE}
+
+\begin{document}
+
+\begin{frame}
+\titlepage
+\end{frame}
+
+\end{document}