Rework new policy page

This inserts a new sentence about the style of policies into the page header ( suggested in #748 ) and moves the 'after creation' text after the form ( suggested in #762 ) .

![screen shot 2014-10-18 at 6 46 19 pm](https://cloud.githubusercontent.com/assets/1239550/4688926/449c3440-569b-11e4-834f-93f11a44c7b6.png)

closes #748 
closes #762