Add apt repo key url to fix error:

    WARNING: The following packages cannot be authenticated!
      mapr-core mapr-fileserver mapr-cldb
    STDERR: E: There are problems and -y was used without --force-yes
Adding Vagrantfile
Adding ruby module to detect mapr node type & generate json
Update Berksfile source for new supermarket URL
Update berks install command for Berkshelf 3.1.3
Merge branch 'update-berkshelf' into add-vagrantfile
Merge pull request #1 from trinitronx/trinitronx/fix-apt-key-error

Attempt to fix apt repo key error
Merge pull request #2 from trinitronx/add-vagrantfile

Add Vagrantfile