[mb-style] MultipleTitleStyle with similar classical pieces

[Andrew Conkling]

There are often classical releases that have multiple symphonies,
concertos, etc. with additional pieces sometimes added as filler. An
example: http://musicbrainz.org/album/2ccbcab4-47e9-4ec9-bc54-4db5c0163e8d.html.

In this, according to CSG/MultipleTitleStyle, the title would be
"Symphonies No. 4 / No. 7 / 'King Stephen' Overture". However, this
gets a bit unclear because only the first two items are symphonies.
Some alternatives:

1) "Symphony No. 4 / Symphony No. 7 / 'King Stephen' Overture"
2) "Symphonies No. 4, No. 7 / 'King Stephen' Overture"
3) "Symphonies No. 4 & No. 7 / 'King Stephen' Overture"
4) (Others?)

cooperaa and I have both tentatively agreed on #2, mainly because it
makes it clear that there are two symphonies and another type of work.
I kinda took the ball and ran with it (as you can see with the example
release 0:-), but someone called me on it elsewhere because it's not
technically correct as per the CSG.

I was wondering if we could get some consensus on an exception of
sorts for classical albums so things could be made more clear.

Cheers,
Andrew Conkling