ZenTao 6.4 stable version released!

Fix the bug: windows stack control panel can't change ports of apache and mysql
Remove the root directory limitation on windows stack. Now user can deploy it like d:\abc\xampp.
Add the feature of restore backup files.
Add unconfirmed tag in bug list page.
Adjust the default page of test task.
Add pager to all products page.
Adjust the batch assign feature of bug module.
Show human name of fields in history.
Add pager to all sprints page.
Now user can only link bugs or stories to a build after it was created.
Add unresolved bugs to release.
Add edit feature to department.
Add batch assign feature to story module.
When paste images to the editor, judge the browser supports the feature or not first.