Secondary block for checkout subtemplates for valid html
Add before-form and after-form blocks
Addd migration for rating sums.
Merge
Added new site to README.
Bump Mezzanine version to 1.4.2
Version bump to 0.8.1
Added tag 0.8.1 for changeset e57e03eda269
Update automated changelog, model graphs.
Use set_default_images in product_db command.
Added Sam Kingston to AUTHORS
Merge remote-tracking branch 'upstream/master' into develop