Fastcore

Bugs Squashed

- fix missing import for `get_source_link` ([392](https://github.com/fastai/fastcore/pull/392)), thanks to [hamelsmu](https://github.com/hamelsmu)
- fix missing import ([391](https://github.com/fastai/fastcore/pull/391)), thanks to [hamelsmu](https://github.com/hamelsmu)

New Features

- add `get_source_link` from nbdev ([390](https://github.com/fastai/fastcore/pull/390)), thanks to [hamelsmu](https://github.com/hamelsmu)

New Features

- add loop functions, thanks to willmcgugan ([363](https://github.com/fastai/fastcore/issues/363))
- add `walk` function ([355](https://github.com/fastai/fastcore/issues/355))
- add `globtastic` and `compile_re` ([354](https://github.com/fastai/fastcore/issues/354))
- add `exec_new` ([350](https://github.com/fastai/fastcore/issues/350))
- add `PythonKernel` ([348](https://github.com/fastai/fastcore/issues/348))
- add `flatten`

Bugs Squashed

- avoid expansion of `%` format strings in `fastcore.script` ([349](https://github.com/fastai/fastcore/issues/349))

New Features

- add class init support to docments ([347](https://github.com/fastai/fastcore/issues/347))
- add timeout param to url functions ([346](https://github.com/fastai/fastcore/issues/346))
- add `L.argfirst` ([345](https://github.com/fastai/fastcore/issues/345))
- add `Path.relpath` ([344](https://github.com/fastai/fastcore/issues/344))
- add `full` and `returns` to `docments`, and derive type from default in `fastcore.script` ([342](https://github.com/fastai/fastcore/issues/342))
- allow use of `docments` in `fastcore.script.call_parse` ([341](https://github.com/fastai/fastcore/issues/341))
- add `docments` ([340](https://github.com/fastai/fastcore/issues/340))

Bugs Squashed

- `untar_dir` always extracts archive even if already exists ([337](https://github.com/fastai/fastcore/issues/337))

New Features

- Support py36 in `untar_dir`