include_class is deprecated

We should be using contain_class instead like what exists in the
rest of the example spec.
Merge pull request #5 from zsprackett/master

include_class is deprecated
better rspec output formatting
use the new 1.0.0 version of rspec-puppet
use the new 1.0.0 rspec matchers
added license details
Install.pp.erb does not write the right class name

Write install instead of intall
Merge pull request #6 from PierreRambaud/patch-1

Install.pp.erb does not write the right class name
Synced with the upstream