eMail Bounce Handler specifications

[Upg] The Export window settings are now persistent during the whole session.
[Upg] The Export window now allows you to include (or not) the column headers.
[Upg] The Export window now lets you set and reuse presets.
[Upg] The Account list is now sorted alphabetically.
[Upg] It is now possible to set the number of bounces to download per session (from 1 to 50).
[Upg] It is now possible to set a default account from the application preferences.
[Chg] PowerPC support has been dropped. The application is now Intel Only. As result the application size has been reduced by half.
[Fix] A new window is now opened when double-clicking on the application Finder icon or clicking on the Dock icon (Mac Only).
[Fix] Several fixes and enhancements to Import and Export preset handling.