Made region embed code more helpful, now shows how to pass data to fields

This was a stumbling block for me at first, so I made version that I think is more helpful.  If there are any fields that have been added to the region, the snippet reflects how to access them.

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![screen shot 2014-07-01 at 5 11 11 pm](https://cloud.githubusercontent.com/assets/316562/3450165/0b7a319c-0175-11e4-989c-5b183dd061af.png)

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![screen shot 2014-07-01 at 5 08 40 pm](https://cloud.githubusercontent.com/assets/316562/3450156/b4054000-0174-11e4-90c9-ae1bafe1469e.png)