Remove chef submodule and Vagrantfile as we have already migrated them to https://github.com/balanced-cookbooks/balanced-billy
Fix #70, implement appears on statement as field
Fix statement is not set for subscription issue
Add custom statement support for subscription refunding
Fix tests using too many connections or deadlock issue
Fix a bug in test_alembic
Allow zero or negtive amount for an invoice
Remove effective amount, assume adjustments are already calculated in invoice.amount
(as this is what we did in Balanced)
Do not allow negtive amount for creating invoice
Fix balanced API version issue in requirements
Fix typo
Refactory functional tests, remove import in method style
(as it doesn't actually bring too much benefits)
Refactory unit test coding style
Rename customer external_id to processor_uri
Refactory the way we create models
Refactory tests
Refactory the tests
Refactory transaction tests
Fix issue caused by git+http://... style package in requirments.txt
Fix a test bug for process_transactions