* Use preferred precision to get round values.

  * Added parent accounts displaying as optionnal parameter.
  * Clean up code (supress old-school 80-character limitation, regroup similar statement together for easy human-eye parsing).
  * Use common dict for sql query.
  * Use custom zsql method for Bank Account related balance.
  * Use better gap sorting method to take care of trailing zero and type of account (true account or 'virtual' one).
  * Mark virtual account with 2 stars.
  * Mark total of expended account with "** (total)" string.
  * Use section_portal_type_list to break acquisition of 'group' property from Person to Organisation.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@6374 20353a03-c40f-0410-a6d1-a30d3c3de9de