Further Ambience Tweaks

[SleepyGemmy]

trafficstars

consider turning on the ambience after this PR is merged.

this PR further tweaks the ambience code and adds a music toggle.

information

the music toggle lets you turn off music from jukeboxes and areas that play music, et cetera.

changes

• adds a music SFX toggle.
• removes "forced ambience".
• adds a "music" list to areas, which fulfills the same purpose as above.
• makes jukeboxes (and derivatives) as well as areas respect the ASFX_MUSIC toggle.

[SleepyGemmy]

!review