Patch from John Millikin adding support for %album_artist% as a variable

2009-02-04  Gabriel Burt  <gabriel.burt@gmail.com>

	* src/Core/Banshee.Core/Banshee.Collection/TrackInfo.cs:
	* src/Core/Banshee.Core/Banshee.Collection/ITrackInfo.cs:
	* src/Core/Banshee.Core/Banshee.Configuration.Schema/LibrarySchema.cs:
	* src/Core/Banshee.Core/Banshee.Base/FileNamePattern.cs: Patch from John
	Millikin adding support for %album_artist% as a variable for file/folder
	name patterns.  This also changes the existing pattern code to treat
	%artist% as album_artist, so that compilation albums will be stored in a
	single directory now (BGO #570298)


svn path=/trunk/banshee/; revision=5013