Tqdm

- support unknown systems https://github.com/warner/magic-wormhole/issues/158, #76, 344 -> 390
- support nested/multi-bars better 384, 285, 329 -> 385
- ease redirection of output (default: `sys.stderr` -> `None`) https://github.com/xonsh/xonsh/issues/2058, #329, 275 -> 293
+ add [examples/redirect_print.py](https://github.com/tqdm/tqdm/blob/master/examples/redirect_print.py)
- minor documentation updates

- fix monitor race condition 338 -> 339
- add explicit NetBSD support 344
- documentation tidy

- thread safety 332
- address `DeprecationWarning` 319 -> 326
- version extra 328 -> 330
- security fix ([CVE-2016-10075](https://nvd.nist.gov/vuln/detail/CVE-2016-10075))
- add non-master branch name
- minor safety
- minor documentation and comments

Officially support Python 3.6, addressing 333

- `postfix` argument added 266->270
- fix tests for
- `numpy` 272->302
- `PyPy3` 318->325
- `7z` extraction example script
- new logo 315
- hit counter with logo colours and stats
- documentation updates
- safer `setup.py` `Makefile` emulation
- better github contributions integrations and Code of Conduct 310

- fix maxinterval to adjust miniters to mininterval 249
- minor bugfixes (eg 288)
- misc optimisations, unit tests, and benchmarks (eg 298)
- documentation updates