adding 2.2.1 release notes
Merge pull request #87 from pulp/mhrivnak-release-notes

adding 2.2.1 release notes
Merge pulp-2.2 => pulp-2.3, pre-build
Automatic commit of package [pulp-puppet] release [2.2.1-1].
Merge (-s ours) pulp-2.2 => pulp-2.3, post-build
Merge commit 'd7baeade335b03a9d7a36042425c699ef335d378'
Merge branch 'pulp-2.3' post 2.2 build.