this may have ramifications due to CORS policy stuff, where if we wanted to adjust the width/height of game from OUTSIDE of the iframe it might be funky!
allowing the window to be resized to fill the viewport
this PR does option 2, so now when making the iframe fullscreen (whether that's via in-game code, or from the site) it simply fills whatever window it's in.
accommodates for #322
we have two options for setting proper fullscreen
this PR does option 2, so now when making the iframe fullscreen (whether that's via in-game code, or from the site) it simply fills whatever window it's in.