Release 0.3.4

Added

• Implemented From<Json> for http::UnpackedResponseBody
• Implemented custom Serialize and Deserialize implementations for http::UnpackedResponseBody
• Added http::ContentType enum to specify http:UnpackedResponseBody content type
• Added content_type(), set_content_type(), is_binary(), is_text(), to_base64(), and from_base64() to http::UnpackedResponseBody

Changed

• Updated Debug, Display, Serialize, and Deserialize implementations for http::UnpackedResponseBody to be content-type aware
• Updated http::UnpackedResponseBody::new() to accept any types that From has been implemented for
• Changed http::UnpackedResponseBody from tuple struct to standard struct
• Improved performance in http::UnpackedResponseBody::from()