this._meteorDataManager is undefined

Hi,

I just started using this package and I found that when pushing a route there an error thrown

The componentWillUpdate function in mixin.js throws the error because
````
this._meteorDataManager
````
is undefined.

If I add this to the mixin.js file it works
````
if(this._meteorDataManager){
newData = this._meteorDataManager.calculateData();
}
````

````
if(this._meteorDataManager){
this._meteorDataManager.updateData(newData);
}
````

Is there something that maybe im doing wrong or is Navigator not supported?

Thanks in advance for any help.
---
react-native-cli: 1.2.0
react-native: 0.38.0
react-native-meteor: 1.0.2