Created HighLevelSongFeature, fixed songHighLevel.xsd
Fixed JAXB package in HighLevelSongFeature
Fixed bugs in HighLevelSongFeature and in songHighLevel.xsd
Completed High Level Song Feature, added a function in MusicbrainzUrl
Created utils package with Document Creation (moved from package
musicbrainz) and FindAlbumArtist to detect album and artist from the
title. Added two custom exceptions for the two files.
Merge pull request #6 from barvince5/musicb

Musicb