[imp]:improve report old api to new api
[imp]:convert report old to new api
[imp]:improve code
[imp]:improve code
[imp]improve string attributes
[imp]:remove unused import
[imp]:improve read_group method
[imp]:remove unused code
[imp]:improve code
[imp]:improve code
[imp]:improve code
[imp]:improve code
[IMP] account : Improved the reports.
[REM]Removed account.period object and related stuff.

[REM]Removed stuff related to account.period from every where.

[IMP]changed period_date in to date_account.

[REM]Replaced period_id with date_account from reports and imporoved stuff.

[IMP]Improved some code for account.period is now removed.

[IMP]Improved code and removed access right of journal.period