Isort

- Fixed issue 948 - Pipe redirection broken on Python2.7

- Fixed issue 942 - correctly handle pyi (Python Template Files) to match `black` output

- Fixed an issue with parsing files that contain unicode characters in Python 2
- Fixed issue 924 - Pulling in pip internals causes depreciation warning
- Fixed issue 938 - Providing a way to filter explicitly passed in files via configuration settings (`--filter-files`)
- Improved interoperability with toml configuration files

- Fixed issue 905 & 919: Import section headers behaving strangely

- Fixed issue 909 - skip and skip-glob are not enforced when using settings-path.
- Fixed issue 907 - appdirs optional requirement does not correctly specify version
- Fixed issue 902 - Too broad warning about missing toml package
- Fixed issue 778 - remove `user` from known standard library as it's no longer in any supported Python version.

- Fixed a regression with handling streaming input from pipes (Issue 895)
- Fixed handling of \x0c whitespace character (Issue 811)
- Improved CLI documentation