fixed #37: adjust default page for player page

add data-default-route attribute to body of player.html EJS.
data-default-route is read by entry.js into redirectTo
(document.body.getAttribute) so pitchers route to /pitches and batters
route to /atbats
Merge branch 'master' of https://github.com/albertlyu/pitchfx-site into albertlyu-master