use xbuild-perl to run application

Now, PrePAN uses xbuild-perl such as /usr/local/bin/perl-5.16.3.

In addition, this pull request includes following change, because we couldn't apply chef recipes to VM created by vagrant (and all machine) until now.

- update knife to 0.0.3
  - 0.0.2 has permission problem in /tmp/ directory.
- migrate Vagrantfile to use Configuration Version 2 to fix too slow network problem.
- fix port forward setting

See also: https://github.com/CPAN-API/prepan/pull/28