0.4.0

Add Part.file_content_field to support in-memory file content (thanks @restlessronin!)

0.3.1

Fix issue overriding Content-Disposition header which would create multiple headers (thanks @awea!)

0.3.0

Generate Content-Length length correctly, by using bytes, not graphemes
Fix generation Content-Disposition header for text parts
Allow use of mime 2.x if available
Fix README example

0.2.0

Stream files in binary mode, not line mode, which preserves line breaks and ensures that binary files are not corrupted on output (thanks @xadhoom)

0.1.1

Initial release