Add support for custom fields in billing invoices

Customers (especially in Europe) need the ability to add Tax IDs, VAT IDs, and other custom fields to their invoices.

Fixes #106
This commit is contained in:
Joseph Schorr 2015-06-12 12:32:41 -04:00
parent 683d5080d8
commit e7fa560787
9 changed files with 426 additions and 8 deletions

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