Smart-open

- Relative path support (PR 73, yupbank)
- Move gzipstream module to smart_open package (PR 81, mpenkov)
- Ensure reader objects never return None (PR 81, mpenkov)
- Ensure read functions never return more bytes than asked for (PR 84, mpenkov)
- Add support for reading gzipped objects until EOF, e.g. read() (PR 81, mpenkov)
- Add missing parameter to read_from_buffer call (PR 84, mpenkov)
- Add unit tests for gzipstream (PR 84, mpenkov)
- Bundle gzipstream to enable streaming of gzipped content from S3 (PR 73, mpenkov)
- Update gzipstream to avoid deep recursion (PR 73, mpenkov)
- Implemented readline for S3 (PR 73, mpenkov)
- Added pip requirements.txt (PR 73, mpenkov)
- Invert NO_MULTIPROCESSING flag (PR 79, Janrain-Colin)
- Add ability to add query to webhdfs uri. (PR 78, ellimilial)

- Accept an instance of boto.s3.key.Key to smart_open (PR 38, asieira)
- Allow passing `encrypt_key` and other parameters to `initiate_multipart_upload` (PR 63, asieira)
- Allow passing boto `host` and `profile_name` to smart_open (PR 71 68, robcowie)
- Write an empty key to S3 even if nothing is written to S3OpenWrite (PR 61, petedmarsh)
- Support `LC_ALL=C` environment variable setup (PR 40, nikicc)
- Python 3.5 support

- Bug fix release to enable 'wb+' file mode (PR 50)

- Disable multiprocessing if unavailable. Allows to run on Google Compute Engine. (PR 41, nikicc)
- Httpretty updated to allow LC_ALL=C locale config. (PR 39, jsphpl)
- Accept an instance of boto.s3.key.Key (PR 38, asieira)

- WebHDFS read/write (PR 29, ziky90)
- re-upload last S3 chunk in failed upload (PR 20, andreycizov)
- return the entire key in s3_iter_bucket instead of only the key name (PR 22, salilb)
- pass optional keywords on S3 write (PR 30, val314159)
- smart_open a no-op if passed a file-like object with a read attribute (PR 32, gojomo)
- various improvements to testing (PR 30, val314159)

- support for multistream bzip files (PR 9, pombredanne)
- introduce this CHANGELOG