Use alternate manifest with support for higher bitrates

This should fix issue #93. Feel free to edit this if there's a cleaner
way to do it.

Fixes #93
Fixes #94
Setting change to let user disable game duration from being shown

Closes #100
Make it possible to use the 24-hour clock system

This will make it possible to switch between 12-hour clock and 24-hour
clock when using localized game time.

Close #101