Upgrade PHPMailer to 2.0.0 rc1.
Misc changes.
Update CHANGES
Refactor disk encryption code.
Cosmetic code changes.
Outsource array functions.
Finish to replace and remove useless sort functions with array_sort_key.
Modify array sort function.
Begin to replace and remove useless sort functions with array_sort_key.
Add universal array_sort_key function.
