* Add cli support
* Add setup.py
* Import main to 'httpx.main'
* Add 'cli' to requirements
* Add tests for command-line client
* Drop most CLI tests
* Add test_json
* Add test_redirects
* Coverage exclusion over _main.py in order to test more clearly
* Black formatting
* Add test_follow_redirects
* Add test_post, test_verbose, test_auth
* Add test_errors
* Remove test_errors
* Add test_download
* Change test_errors - perhaps the empty host header was causing the socket error?
* Update test_errors to not break socket
* Update docs
* Update version to 1.0.0.beta0
* Tweak CHANGELOG
* Fix up images in README
* Tweak images in README
* Update README
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