* 1.3.3, 16th May 2016

• 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 for 1.3.1

1.3.2, 3rd January 2016
Bug fix release to enable 'wb+' file mode (PR #50)