Breaking Changes
- remove `parallel_chunked`, use `chunksize` arg to `parallel` instead ([81](https://github.com/fastai/fastcore/issues/81))
New Features
- move fastscript to fastcore.script ([84](https://github.com/fastai/fastcore/issues/84))
- add `run_proc` and `do_request` ([83](https://github.com/fastai/fastcore/issues/83))
- added `chunksize` to `parallel`, which passes to `ProcessPoolExecutor.map` ([82](https://github.com/fastai/fastcore/issues/82))
- move metaclasses and delegates et al to new `meta` module ([80](https://github.com/fastai/fastcore/issues/80))