[feature request] object-path -like pluck

Object path has an incredibly useful way of retrieving data from complex object structures.

https://github.com/mariocasciaro/object-path

Would love to see an API like this:

```
_([{ foo: { bar: [1,2,3] }}])
.pluck('foo.bar.0')
.doto(_.log) // 1
```

No repository files or tests are named. Start by reviewing the linked object-path project and Highland's existing pluck API, then compare them with the proposed example. Done means a path such as `foo.bar.0` can retrieve the nested value and produce `1` for the shown input.

Written by the indexing model from the issue text.