Thrift-sasl

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- Identical to 0.4.3a2

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* **Improvements**
- Use pure-sasl instead of sasl to avoid dependency on g++

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* **Bug Fixes**
- Replaced environment conditionals with environment markers in `setup.py` (29)
- Make sure frames are fully buffered when used together with thriftpy / thriftpy2 (31)

* **Improvements**
- Added build script to build sdist archive and universal wheel
- Unpin thrift version with Python 2

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* **Bug Fixes**
- Fixes a bug where Thrift transport was not reading all data (22)

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* **Bug Fixes**
- Fix compatibility with Python 2 and 3 (19)

* **Improvements**
- Add CHANGELOG.md and remove old contacts from setup.py (20)