Notes:
lot of fixes, basically on the IMAP backend


Changes:
Z-Push RC3 -> RC4 (r22)
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- Fixed trying to set php timeout (general)
- Fixed minor comment about PEAR in INSTALL (general)
- Added correct handling of exception data (protocol)
- Added truncation flags+support (protocol/all backends)
- Fixed ICS exceptions (ICS backend)
- Fixed parsing exception start date (ICS backend)
- Softdelete messages by default (ICS backend)
- Fixed handling in frontend for multiple moves (ICS backend)
- Fixed undefined flag (ICS backend)
- Fix for deletions breaking UIDs and therefore doing strange things (grl/Bas) (IMAP backend)
- Fixed indenting (IMAP backend)
- Fixed read/unread flags (grl) (IMAP backend)
- Fixed 'seen' flag on imap messages being TRUE all the time (IMAP backend)
- Fixed include of RFC822 (should fix sending email in some cases) (IMAP backend)
- Fixed multi-level folders (IMAP backend)
- Implemented ChangeFolder for folder creation (IMAP backend)
- Fixed missing 'FT_PREFETCHTEXT' in GetMessage() (IMAP backend)
- Fixed typo (config)