Spike: Determine if and how data.table can be used

- [data.table](https://github.com/h2oai/datatable) is:
> a Python package for manipulating 2-dimensional tabular data structures (aka data frames). It is close in spirit to pandas or SFrame; however we put specific emphasis on speed and big data support
- Let's see how this can fit in with Woodwork, and if it would help us read in datasets faster and/or do faster statistical calculations.