fix jumping popover on labels + fix horiz placement (close #108)
fix too many legend elements in small screens
100% footer buttons
fix tuto mod0
handle tuto when one bill selected + refacto + reactivate for mod0 by default
update to latest intro.js
fix tuto mod2
fix tuto mod2b
fix svg for tuto mod1, still need to fix clicks and links
fix tuto mod1 and reactivate it everytwhere, hurray (close #99)