Isort

- Fixed a regression with */directory/*.py style patterns

- Fixed the inability to accurately determine import section when a mix of conda and virtual environments are used.
- Fixed some output being printed even when --quiet mode is enabled.
- Fixed issue 890 interoperability with PyCharm by allowing case sensitive non type grouped sorting.
- Fixed issue 889 under some circumstances isort will incorrectly add a new line at the beginning of a file.
- Fixed issue 885 many files not being skipped according to set skip settings.
- Fixed issue 842 streaming encoding improvements.

- Fix error caused when virtual environment not detected

- Fixed issue 876: confused by symlinks pointing to virtualenv gives FIRSTPARTY not THIRDPARTY
- Fixed issue 873: current version skips every file on travis
- Additional caching to reduce performance regression introduced in 4.3.5

- Fixed Windows incompatibilities (Issue 835)
- Fixed relative import sorting bug (Issue 417)
- Fixed "no_lines_before" to also be respected from previous empty sections.
- Fixed slow-down introduced by finders mechanism by adding a LRU cache (issue 848)
- Fixed issue 842 default encoding not-set in Python2
- Restored Windows automated testing
- Added Mac automated testing

- Fixed a bug that led to an incompatibility with black: 831