Nbcelltests

See the [0.2.1 milestone](https://github.com/jpmorganchase/nbcelltests/milestone/3?closed=1) for a list of changes included in this release.

See the [0.2 milestone](https://github.com/jpmorganchase/nbcelltests/milestone/1?closed=1) for a list of changes.

- Test and lint object 27
- Linter cleanup
- Packaging cleanups
- Py3.6+
- Windows path fixes
- Better parsing (uses AST rather than string parsing)
- Autopep
- Kernel checks

- Lint returns objects
- Better dist
- Raw reports/json
- Better docs