v2.2.0: Merge pull request #60 from ONSdigital/release/upversion

• Change all instances of ADD to COPY in Dockerfile
• Remove use of SDX_HOME variable in makefile

2.1.0

• Update timestamp in all logs as UTC
• Update to use async_consumer from sdx-common
• Add common library logging
• Add environment variables to README
• Add correct license attribution
• Add codacy badge
• Add support for codecov to see unit test coverage
• Add logging binary filename before attempting delivery
• Fix incorrect git merge in Dockerfile and requirements.txt

v2.0.0

• Log version number on startup
• Fix handling of None responses in remote call
• Add SFTP support
• Change nack for retry to nack for SDX logging
• Change status_code to status for SDX logging
• Change logging messages to add the service called or returned from

v1.0.0

Initial release