Apply the correct Puppet URI scheme based on Puppet offical doc

Based on http://docs.puppetlabs.com/references/latest/type.html
the Puppet URI scheme is puppet:///modules/name_of_module/filename
while in the module it was puppet://name_of_module/filename
Merge pull request #28 from Spredzy/correct_puppet_uri

Apply the correct Puppet URI scheme based on Puppet offical doc