Bug fix: Live games should work again

I forgot to change one last variable when killing set_resolved_url()
tighten up game_version_ids loop
whitespace and comment fixes
Move game-version selection to a function
new background image

Closes Issue #71
Move bitrate selection for Live streams to default.py

The rest of select_bitrate will follow when I make some decisions about
using the stream manifest for bitrate info.
Tiny cleanups