added ubuntu 12.10 package dependencies to README.md

wanted to make it easy to copy / paste what one would need prior to installing the software for ubuntu.  I used this vagrant https://github.com/bdossantos/puppet-module-couchdb project to get couch installed easily -- I also changed the vm from precise64 to quantal64 locally to meet the 12.10 minimum requirement for Nemaki (didn't feel like forking the project)

```ruby
  config.vm.box = "quantal64"
  config.vm.box_url = "https://github.com/downloads/roderik/VagrantQuantal64Box/quantal64.box"
```