ISISd version 0.0.6 now available

Changes from 0.0.5

o lots of changes to SPF
- runs the SPF for IPv4 and IPv6 separately
- a number of bugs fixed
- simplified the implementation
- "7.2.7 Removal of excess paths" implemented
o ported to freebsd (tested in 4.5-STABLE and 4.6-STABLE)
o moved to zebra-0.93-pre2
o "show isis topology" command added
o "show (ip|ipv6) route isis commands added to zebra
o a number of fixes and additions (e.g. checksum calculation and DIS state change event) by BeomSeok Gwak added