added Game Over functionality
had to change count from 3 back to 10
Merge pull request #28 from dysFunctions/jamesStiehl

added Game Over functionality
added periodic table image
Merge pull request #29 from dysFunctions/jamesStiehl

added periodic table image
Merge branch 'master' of https://github.com/dysFunctions/elements into quizbox
made quiz page responsive using media queries