\documentclass[aspectratio=169]{beamer}
	\usepackage{fontspec}
	\usepackage{xunicode}
	\usepackage{hyperref}
	\setsansfont{Alegreya Sans}
	\usefonttheme{professionalfonts}
	\setbeamercolor{structure}{fg=black}
	\usepackage[absolute,overlay]{textpos}
	\setbeamertemplate{navigation symbols}{}
	\newcommand{\link}[1]{\href{#1}{\textcolor{blue}{\texttt{#1}}}}
	\newcommand{\davidrevoy}{\begin{textblock*}{6em}(\textwidth,0.5em)
			\centering \scriptsize Image par

			David Revoy

			\vspace{0.25em}
			\includegraphics[width=0.5\textwidth]{ccby.jpg}
		\end{textblock*}}
\begin{document}
	\include{parts/intro}
	\include{parts/presagen}
	\include{parts/federation}
	\include{parts/contenus}
	\include{parts/decouverte}
	\include{parts/fonctcools}
	\include{parts/roadmap}
	\include{parts/conclu}
\end{document}