Article preview component

That's a first commit. I've been confused about how to deal with the share content (with the icons) because in desktop mode, it had to overflow the card, and the card had an overflow:hidden property value to get the rounded corners. I hesistated a long time... beginning one solution then coming back, again and again... Then i tried to put the share div outside the card and to code the positionning and sizing myself, before i had a look on tooltips libraries. Then i struggled with a library called Popper JS. I managed to get it right in mobile view... Now everything is set to make some css for desktop view in a media query... Oooh my head ! ^^'