Update comment for ibus-mozc.
Remove an unused variable.
Remove anthy and subversion from pre-installed packages.
 - mozc is useful enough
 - mikutter no longer uses svn for the develop branch
Uset tmpfs for /tmp instead of mfs.

Not sure why I chose mfs.. (because tmpfs was broken on 5.0?)
Also remove svnserve from rc.conf.
Use sh(1)'s $((expression)) for arithmetics instead of expr(1).
Add a dumb "mkimagebuilder.sh" script for lazy liveimage builds.

This dumb script builds a qemu image that configures liveimage
automatically without prompt, so we can build multiple images
by a dumb batch script.

See description in comment for details.
Add more working dirs.
Add a packages list for 20130407 using pkgsrc-2013Q1
Add a dumb script which copies necessary packages into setupliveimage dirs.

Requires list/packages-YYYYMMDD.list file to specify packages.
Add a dump script to automate building images.

This script creates a qemu image which includes a script that calls
necessary install operations and also call VBoxManage to convert
raw image to VDI format.
See also description in mkimagebuilder.sh.

XXX should be rewritten to use make(1) and Makefile for parallel build.