Smart-open

- Add naitive .gz support for HDFS (PR [128](https://github.com/RaRe-Technologies/smart_open/pull/128), [yupbank](https://github.com/yupbank))
- Drop python2.6 support + fix style (PR [137](https://github.com/RaRe-Technologies/smart_open/pull/137), [menshikh-iv](https://github.com/menshikh-iv))
- Create separate compression-specific layer. Fix [91](https://github.com/RaRe-Technologies/smart_open/issues/91) (PR [#131](https://github.com/RaRe-Technologies/smart_open/pull/131), [mpenkov](https://github.com/mpenkov))
- Fix ResourceWarnings + replace deprecated assertEquals (PR [140](https://github.com/RaRe-Technologies/smart_open/pull/140), [horpto](https://github.com/horpto))
- Add encoding parameter to smart_open. Fix [142](https://github.com/RaRe-Technologies/smart_open/issues/142) (PR [#143](https://github.com/RaRe-Technologies/smart_open/pull/143), [mpenkov](https://github.com/mpenkov))
- Add encoding tests for readers. Fix [145](https://github.com/RaRe-Technologies/smart_open/issues/145), partial fix [#146](https://github.com/RaRe-Technologies/smart_open/issues/146) (PR [#147](https://github.com/RaRe-Technologies/smart_open/pull/147), [mpenkov](https://github.com/mpenkov))
- Fix file mode for updating case (PR [150](https://github.com/RaRe-Technologies/smart_open/pull/150), [menshikh-iv](https://github.com/menshikh-iv))

- Remove GET parameters from url. Fix 120 (PR 121, mcrowson)

- Enable compressed formats over http. Avoid filehandle leak. Fix 109 and 110. (PR 112, robottwo )
- Make possible to change number of retries (PR 102, shaform)

- Bugfix for compressed formats (PR 110, tmylk)

- HTTP/HTTPS read support w/ Kerberos (PR 107, robottwo)

- HdfsOpenWrite implementation similar to read (PR 106, skibaa)
- Support custom S3 server host, port, ssl. (PR 101, robottwo)
- Add retry around `s3_iter_bucket_process_key` to address S3 Read Timeout errors. (PR 96, bbbco)
- Include tests data in sdist + install them. (PR 105, cournape)