Added to the sell inventory portlet.

Updated the workflow to show different lists based on step in the
process. When an option is selected the data is set to a session
variable and the step is updated. This commit marks the end of selecting
a user and that users addresses.
Finished the workflow of the sales process

The committing to the datebase doesn't work and breaks the application.
Updated database and fixed data insert.

Added hints to the database fields and fixed the field definition so
that the invoices could be added to the database.