2010-03-02 yusei * Remove short title.
2010-02-19 yusei * Set business_application category to Sale Invoice Module and Purchase Invoice Module.
2010-02-03 yusuke * Invoice workflow supports auto_plan transition.
2009-10-16 yusei * Update for the changes of new portal types of portal types.
2009-06-22 tatuya set quantity unit on invoice lines
2009-06-19 tatuya
* initial creation so that it enables to create invoices independently