Bill4Time/mongo-fast-join — pull request #9 by zacharynevin (2014-06-24 07:48:35+00:00)
Title: Added projection aggregation operator

Select fields from the joining table using the `projection` field. Use it like a normal projection:

````
join({
joinCollection: collection,
leftKeys: [],
rightKeys: [],
newKey: '',
projection: { 'column1: 1, 'column2': 0 }
````