Added Cake.Yaml and Cake.Json addins.
Added Cake.Yaml and Cake.Json addins.

SharpeRAD/Cake.Website,cake-build/website,cake-build-bot/website,devlead/website,cake-build-bot/website,cake-build/website,devlead/website,devlead/website,SharpeRAD/Cake.Website,cake-build/website