adds content-section-d and #img-schemmer
portfolio section update: adds .content-section-d and #portfolioModal4
adds buttons and canvas for game of life
adds canvas and btn for game of life; deletes #portfolioModal for game of life; adds custom js for game of life
adds oo js for game of life
updates url to marianne-schemmer.com
updates resetGame: now calls stopTimerAnimation and sets _timerActive back to false