header (C) fixes
iprt/isofs: gcc warning and 32-bit file size limit explanation
*: Use RTLISTANCHOR.
Build fixes.
Guest Copy/Guest Additions: Update.
*: Fixes for incorrect RTStrAPrintf usage (it does NOT return an IPRT status code) and the odd bugs nearby.
IPRT/isofs.h: Tabs, documentation.
IPRT: Added ISO 9660 FS support.