v0.2.0 Released

Changes:

• Global configuration file for git credentials, cache location and size, no loop device, and others; see Configuration Reference in the docs for more details.
• Rename build.earth to Earthfile
• GitLab support
• Ability to change cache path (previously it was hard-coded to /tmp/earthly; now defaults to /var/cache/earthly on Linux or ~/Library/Caches/earthly on macOS)
• HEALTHCHECK command support
• Fixed out of disk space error
• Fixed support for stdout reset control characters (which are used for installation progress bars)
• Added Scala, c++, dot net examples

Upgrade instructions:

• docker stop earthly-buildkitd
• sudo rm -rf /tmp/earthly
• Re-run the install command for your OS