update schema for workgroup feedback

relabel migration at 0008
mattdrayer/rebase-20140926-cherrypicks: Added recent commits to rebase branch
mattdrayer/api-proforma-migration: Added migration file
ziafazal/api-fix-course-image-url: make image url relative

uncomment discussion stats call
rename misnumbered migration
mattdrayer/api-orgs-complete-count: New metrics operation
Merge pull request #257 from edx-solutions/mattdrayer/rebase-20140926-cherrypicks

Mattdrayer/rebase 20140926 cherrypicks