Get freebsd 9.1 32 & 64 bit working

Sadly it appears we need the following for omnibus chef to work

* bash installed
* /bin/bash symlinked to /usr/local/bin/bash
* Curl installed (or wget - or omnitruck updated to support "fetch")
* bash as the default shell for the "vagrant" user

By making changes to not use ports anymore - and the addition to the cleanup script - i was able to get a providerless box down in size (substantially - previous builds were over 1G in size)

```
ls -la ~/Desktop/opscode_freebsd-9.1_provisionerless.box
-rw-r--r--  1 petecheslock  staff  473783294 Nov  4 21:34 /Users/petecheslock/Desktop/opscode_freebsd-9.1_provisionerless.box
```

Also - It looks like the Iso MD6 for Debian 6.0.8 was incorrect - this fixes.  

I've also only confirmed these work with Test Kitchen - I haven't tested with straight vagrant and those provisioners.  

I've also got some freebsd 9.1 32bit work in progress, but wanted to get this PR open for review (I also did not yet test vmware support - so maybe someone can try that for me).