Add ALBUMARTIST property mapping for MP4
Add ALBUMARTIST property mapping for MP4

https://code.google.com/p/mp4v2/wiki/iTunesMetadata

davispuh/taglib,MaxLeb/taglib,dlz1123/taglib,TsudaKageyu/taglib,TsudaKageyu/taglib,i80and/taglib,Distrotech/taglib,taglib/taglib,MaxLeb/taglib,videolabs/taglib,Distrotech/taglib,black78/taglib,pbhd/taglib,black78/taglib,Distrotech/taglib,i80and/taglib,taglib/taglib,davispuh/taglib,MaxLeb/taglib,i80and/taglib,davispuh/taglib,videolabs/taglib,pbhd/taglib,dlz1123/taglib,black78/taglib,pbhd/taglib,videolabs/taglib,taglib/taglib,TsudaKageyu/taglib,dlz1123/taglib