Additional payment, bank statement and voucher addons for OpenERP

Merge proposals dependent on lp://staging/~enlightx-deactivatedaccount/account-payment/7.0_account_vat_on_payment_fixes

  1. 7.0_account_vat_on_payment_fixes
  2. Dependent merge proposals

lp://staging/~enlightx-deactivatedaccount/account-payment/7.0_account_vat_on_payment_fixes has no merge proposals.