Bash is dead, Long live Bash.

This adjusts the following

* Remove bash - no longer needed for vagrant
* Removes installing portsclean - as cleanup script does this
* Add a Freebsd i386 9.1 build config
Merge pull request #120 from petecheslock/kill-bash

Remove bash from FreeBSD boxes. Remove portsclean. Add i386 FreeBSD definition.
Fixed debian-6.0.8-*.json to use mirror variable
Merge remote-tracking branch 'opscode/master' into mirror_selective
Modified freebsd-9.1-i386.json to use mirror variable