"setInterval" instead of "requestAnimationFrame"

It seemed that "requestAnimationFrame" did not work properly when calling it from a different window, but apparently the same goes for "setInterval". Regardless, this version is saved in a branch because it might be useful at some point.
Stage detaches into featureless window
"ShowOnMovement" directive tweaks
Tweak
Tweak
"ShowOnMovement" directive todo
FileReader tweaks for Firefox
No FileReader error message
Audio continues playing after detachment
Playback icons without preview
Playback icons with preview
Fullscreen button for playback interface
Ambience Stage submodule
Scene crossfading