Add function to read data stream (tabular)

Purpose of function is to data type mapping so raw CSV becomes stream of "objects" with property values having right types.

i.e. csv

```
name,amount,date
jones,1.82,2015-06-22
```

becomes

```
{
  name: "jones",
  amount: 1.82
  date: Date(2015,06,22)
}
```

Note: same kind of streaming support should be there as in the underlying csv library.
