External Puppet files plus Ubuntu 10.04 support

[keeleysam]

This adds support for external puppet URLs, which is very useful if storing the VMware tools in another module from which this module is called. In addition, the params are rewritten to better support different versions of Ubuntu, which is needed for 10.04.

[craigwatson]

Thanks very much for the request - unfortunately your code fails a few Puppet Lint checks, would you mind fixing them before I merge?

See here for details: https://travis-ci.org/craigwatson/puppet-vmwaretools/jobs/23567201

Thanks :)

[keeleysam]

This now passes lint.

[craigwatson]

Thanks - I'll revert the travis commit once I've merged - FYI you can run the lint tests locally with rake lint.

There's also a slight gotcha with quoted booleans, as facts are returned as strings - will correct that too :)