Previously, apt::key used a noop exec hack to do exactly what anchors were
intended to be used for. This commit removes the exec hack and achieves the
same end using Anchor resources from the puppetlabs/stdlib module.

Convert apt::key to use anchors

Previously lowercase keys would be installed every
puppet run because apt-key list returns an uppercase
key. This commit makes the comparison case insensitive.

(#13125) Apt keys should be case insensitive

…re path

This removes the need for depending on a global site.pp, and depending on the
checked out apt module to be called 'apt' as well.

It pulls in stdlib via sub-modules as I don't have a better way to deal with
dependencies yet. It has pinned the revision for stdlib to 2.2.1 which is the
minimum required version for apt to work.

Ticket/master/13289 Style violations & rspec cleanup

This commit modifies .gitingore to ignore changes to the pkg directory
used when building Forge releases.

Prior to this commit, the source.pp test included an apt source
named foo which broke the apt-get update exec when applied on a
target system. This commit removes it in favor of the puppetlabs
apt source which is valid on all target platforms.

This commit adds a smoke test for key.pp, adding a key declaration
for the puppetlabs apt source.

This commit modifies some smoke tests with real-world usage examples
instead of providing things like 'foo' that the module user must
replace in order to conduct a smoke test or try out example functionality.

Tickets/13261/improve smoke tests

This commit updates both the Modulefile and CHANGELOG for the 0.0.2
Puppet Forge release.