[Banshee-List] patch notify - ipod support for compilations

[Nyall <nyall zombiepigs net>]

This patch correctly sets the iscompilation attribute on tracks
transferred to an ipod. The patch checks to see if the albumartist
equals "Various Artists", and if so, sets the iscompilation to true.

Correctly setting the iscompilation attribute means that on newer ipods, if the 
compilations option is on, the ipod no longer lists artists only present on
compilation discs. This prevents the artist list on the ipod filling up with a
bunch of separate artists when you transfer a compilation.

Note that the compilation support is also an option on the ipod itself, so,
anyone desiring the previous behaviour can simply switch this option off.

http://bugzilla.gnome.org/show_bug.cgi?id=538936

Cheers!
Nyall