(#96) - Updated versions, added two new modules to the cahce

- Fixes Issue #96 on github
- Versions for cached packages synced with reality
- We now also cache puppetlabs-apt and puppetlabs-postgresql
  - the above are deps for puppetdb
Merge pull request #110 from casharma/vm/cache

(#96) - Updated versions, added two new modules to the cahce