Hastymail2 RC 5 released

Lots of great updates in this release. Reworked the AJAX system to
significantly reduce requests. Moved library code to smaller files
to reduce memory usage by up to 25% at the cost of an extra include.
Lots of layout fixes that greatly improve cross browser consistency
and a new theme called "aqua". Translation updates including fixing
some missing strings, updates to the Dutch interface, and a new German
translation. Added an option to display HTML message parts in an iframe
to protect the interface from poorly formatted messages, an SMTP auth
fix, Version 1.x profile and settings conversion scripts, a custom
logout URL option, IMAP-UTF7 folder name support, and lots more.
As always thanks to everyone supporting the project with testing
and feedback.