Log Message:
www/hs-yesod: import hs-yesod-1.6.2.1

The yesod package groups together the various Yesod related packages into
one cohesive whole. This is the "battery loaded" version of Yesod, whereas
most of the core code lives in yesod-core.

Yesod is fully documented on its website: http://www.yesodweb.com/