Fixed HTML validation issues on front page
Fixed HTML validation issues on front page

mitsuhiko/flask-website,eromoe/flask-website,mitsuhiko/flask-website,MurtazaB/flask-website,LiHaoGit/flask-website,eromoe/flask-website,mitsuhiko/flask-website,MurtazaB/flask-website,LiHaoGit/flask-website,MurtazaB/flask-website,eromoe/flask-website,LiHaoGit/flask-website