Using element selector in view model used in composition doesn't work

**I'm submitting a bug report**

* **Library Version:**
1.1.2

**Please tell us about your environment:**
* **Operating System:**
Windows 10 Pro

* **Node Version:**
6.10.0

* **NPM Version:**
3.10.10

* **Aurelia CLI OR JSPM OR Webpack AND Version**
webpack 2.2.1

* **Browser:**
all

* **Language:**
TypeScript 2.3

**Current behavior:**
Using selector in a viewmodel to get an element marked with ref="" doesn't work when the view/viewmodel is used in a composition.

View: `

`
ViewModel: `attached() { console.log(this.hisory); }` returns undefined.

**Expected/desired behavior:**
Referenced element should be available in the viewmodel.

Start by reproducing the composition case described in the view and view model, using the `ref="history"` element and checking the value during `attached()`. Trace how composition supplies the view model and how the referenced element is exposed; done means the referenced element is available in the view model in that scenario.

Written by the indexing model from the issue text.