Add PuppetDB 1.2 toc and external source
Fixes to _config.yml for puppetdb 1.2
Merge pull request #1 from nfagerlund/puppetdb1.2fix

Fixes to _config.yml for puppetdb 1.2
Merge pull request #154 from nicklewis/master

Add PuppetDB 1.2 toc and external source