extend active model callbacks
Move order email actions to separate methods
Merge pull request #130 from cjbell/move-order-email-to-methods

Move order email actions to separate methods
Add indexes for all tables where appropriate.
Remove index for Tax Rates. Update test app db/schema
Merge pull request #131 from cjbell/add-indexes

Add indexes for all tables
Merge remote-tracking branch 'upstream/master' into bug/category_permalink_format
update indexes