Switch from deprecated API; alter album schemas

This switches from the deprecated Freebase API to the Google API
for Freebase, version 1.
It also adjusts the MQL queries made, to cope with the way that
albums and tracks were refactored in Freebase to have tracks attached to
releases which are attached to albums.
Merge pull request #1 from TJC/googleapi

Switch from deprecated API; alter album schemas