[fix] issue#980
Merge https://github.com/frappe/erpnext into item_group
[Fix] Issue #980 final
Merge pull request #2089 from neilLasrado/item_group

Item group
[hotfix] Supplier read permission for Purchase User
Commonify Recurring Sales Order/Invoice
Add manage_recurring_documents and path to hooks, fix minor issues
Add tests for Recurring Document, Sales Inv, Sales Order, fix minor errors
Add patch for field name change in SI, rename email template