README update with menu instructions
README update with menu instructions

GrandesDados/hugo-theme-casper,gotokatsuya/hugo-theme-casper,gotokatsuya/hugo-theme-casper,pdan/caspian,LFirestorm/hugo-theme-casper,prmtl/hugo-theme-casper,LFirestorm/hugo-theme-casper,jrdjz/hugo-theme-casper,jrdjz/hugo-theme-casper,caffeineflo/hugo-theme-casper,wicast/casper,GrandesDados/hugo-theme-casper,caffeineflo/hugo-theme-casper,wicast/casper,pdan/caspian,vjeantet/hugo-theme-casper,daustin/hugo-theme-casperilla,prmtl/hugo-theme-casper,daustin/hugo-theme-casperilla,vjeantet/hugo-theme-casper