Refonte de la page “À propos” : vraie description, Gandi & Café des Sciences, mises à jour, vraie mise en page #1893

Job	Run time
Build Sphinx documentation	1m 16s
Lint	34s
Lint and build front-end	49s
Install and test zds-site (zds.tutorialv2)	7m 53s
Install and test zds-site (zds.member zds.gallery zds.searchv2 zds.middlewares zds.pages)	5m 3s
Install and test zds-site (zds.forum zds.featured zds.mp zds.notification zds.utils)	7m 21s
Push coverage to Coveralls	9s
Push documentation to GitHub Pages	0s
	23m 5s

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