Fixes a bug where skydrive gets installed every time.

Without this fix Skydrive gets installed every time boxen is runned

I had open a pull request on puppetlabs to fix the pkgdmg provider that fix the ability to install flat pkg files from remote locations. The pull request was accepted and it should be released in Puppet 3.3.0  https://github.com/puppetlabs/puppet/pull/1648

This fix to the skydrive module add the fixed provider and use it. Probably the provider should be removed when Puppet 3.3.0 gets released and boxen updates puppet. For that, this provider was added in a different commit https://github.com/blackjid/puppet-skydrive/commit/11780ffd1d88c15621c46ffaec597d98715480a5

thanks!