Switch the default inputmethod from ibus-anthy to ibus-mozc.
Note ibus-anthy is still available.

liveimagefiles/inst.sh:
 - install mozc packages:
  - mozc-server, mozc-tool, ibus-mozc (in pkgsrc HEAD)
  - mozc-elisp (PR pkg/47573)
 - make mozc-jp default ibus inputmethod in gconftool-2 settings

liveimagefiles/skel/.emacs
 - add mozc settings
 - comment out anthy settings
 - add comments
Bump REVISION to 20130217 for mozc support.
Also bump setupliveimage fssize for large qt4 and mozc binaries.
Add packages list for 20130217 using pkgsrc-2012Q4 and mozc from HEAD etc.