Pin to stdlib dependency to 4.x

This gives us, amongst other things, the ability to propagate refresh events
to through anchors. Drops support for Puppet 2.7
Reinstate anchor pattern

This was present in @spiette's original repo. The pattern that @garethr
replaced it with isn't something that I've seen before.

It doesn't satisfy other resources chaining *before* this containing class.
They float off to the side. As demonstrated by:

https://gist.github.com/dcarley/5883522

Notifying the containing class now also notifies the service. Which required
stdlib >= 4.0, per the previous commit.
Disable lint class_inherits_from_params_class

Another check for Puppet 2.6.2 backwards compatibility. Added links for both
of the disabled checks. One was incorrect, due to a problem with the
puppet-lint site, which I've also submitted a fix for:

https://github.com/rodjek/puppet-lint/pull/206