now defaults to false install

too easy to overlook setting this back to false after first run. would rather have to set it to true.
changed extra flad to mount_options

If not, error is produced with vagrant 1.3.5: 
vm:
* The 'extra' flag on synced folders is now 'mount_options'
changed mount_options flag parameters to array

otherwise Vagrant 1.3.5 produces error:
vm:
* Shared folder mount options specified by 'mount_options' must be an array of options.
commented out pp_path line to avoid error message

otherwise in vagrant up, the following error occurs:
puppet provisioner:
* The following settings shouldn't exist: pp_path
Merge pull request #1 from jackamoratis/master

Vagrant 1.3.5 update