Move content properties out of inlined resources on nt:file nodes

Fixes https://www.pivotaltracker.com/story/show/62090014

![screen shot 2013-12-06 at 16 06 28](https://f.cloud.github.com/assets/111218/1697145/b30d2b0c-5ed3-11e3-88e9-ff1883ffc347.png)