add first version of new item types divider_ , sub_total item
enhance items array description with proposal from json-schema draft v4
add search filter to email_templates
add clients ids filter
Merge pull request #3 from SniperSister/master

merge product.json fixes
Merge branch 'add_template_search_filters'
add name attribute to all objects with lowercase_under_scored object name. Title will be replaced in near future with CamelCasedObjectName
update changelog bump version 0.6
Update README.rdoc
add external_ref for line items
remove required for email.from_addr