Enable dependent relationships

The issue with the model-status was giving incorrect information about the gist's ability to set the `isDirty` flag. The dependent relationships code appears to work out-of-box.

See .gif below outline 3 cases: the client being modified, a new line being added, and an existing line being modified.

![isdirtyworks](https://cloud.githubusercontent.com/assets/740289/3433814/1d6486a2-0083-11e4-8d46-059b041d7694.gif)