created renderMethods, adjusting css, deadhc fixes

moved any methods that rendered from hero,player,leaderMethods to
renderMethods.

app.js:
now used methods from renderMethods.js

d3functions.js:
dead HC hero would cause itemPieChart to not render
playerMethods.js:
insert and update adds lastupdated

leaderboard.css:
adjusting how graph and statistics are shown
*TODO* center divs inside container

classLeaderboard.ejs:
dead HC players caused page to render incorrectly.
average is calculated for only alive players.
*TODO* d3 data accurate to which date

hero.ejs:
shows when player was lastupdated