Remove spurious line
Cleanup attachment storage handling

Use new Horde_Core_HashTable_PersistentStorage for temporary attachment
data.

VFS linked attachments now uses a completely separate object.  The
previous method was clever (reusing much of the temporary attachment
code), but confusing.

Switching between linked and temporary attachment data is now handled by
another abstracted driver. In the event config is "always link", we can
skip this intermediate driver altogether.
Actually return stream data
[mms] Don't send empty text part if a message contains attachments.
Better default height setting for ckeditor; minimizes resizing effect