Why is it?
	Beamer is the most popular class
	Among LaTeX packages for making presentation
	However, Beamer is too straight
	Interested by the slide design in ConTeXt
	Let's design some new styles in LaTeX

Packages used
	[geometry] set the screen size
	[fancyhdr] set header and footer
	[titling] set title format
	[tikz] design the background
	[eso-pic] display the background

How to use the *.cls
	using \documentclass{} to declare the class
	using \myfrontcover to show the title page
	using \tableofcontents to show the outline
	using \section{} to start a topic
	using \newpage to begin a new slide
	using \mybackcover to show the end page
	no more difference with LaTeX