Adding iTunes to the sidebar
Merge remote branch 'mbbitbucket/beta' into mbs-6167

Conflicts:
	root/components/common-macros.tt
Merge branch 'beta' of https://bitbucket.org/metabrainz/musicbrainz-server into mbs-6167

Conflicts:
	root/components/common-macros.tt
	root/static/styles/layout.css