Use "mongo lookup" of "view" with Tabular

Nobody has claimed this yet.

I try to create `view with lookup relation`, and then use it in `meteor-tabular`.

```bash
db.createView (
"orderView",
"order",
[
{
$lookup: {
from: "customer",
localField: "customerId",
foreignField: "_id",
as: "customerDoc"
}
},
{
$unwind: "$customerDoc"
}
]
)
```
```js
let OrderView = new Mongo.Collection('orderView');
...
name : 'order',
collection : OrderView,
columns : [
{data: "_id", title: "ID"},
{
data: "orderDate",
title: "Date",
render: function (val, type, doc) {
return moment(val).format('DD/MM/YYYY');
}
},
{data: "total", title: "Total"},
{data: "des", title: "Description"},
{data: "customerDoc.name", title: "Name"},
],
```
it work fine, but it is slow to react (real time).

The report names a MongoDB view with $lookup and a meteor-tabular Mongo.Collection, but no repository files or tests. Start by reproducing the example and measuring reactive update latency; done means the view-backed table responds acceptably to changes in the joined data.

Written by the indexing model from the issue text.