Hephy Slugbuilder v2.7.0

v2.6.0 -> v2.7.0

Features

• 2f0976d slugbuilder: update stack to heroku-18-build (#10)

Fixes

• 6f9c0c2 rootfs/builder/build.sh: fix /tmp/env copy statement
• 568f4af travis.yml: fix spelling travis.yml and change script

Hephy Slugbuilder v2.6.0

v2.5.0 -> v2.6.0

Documentation

• ee5cd1a README.md: remove outdated license blurb
• e3fcacc README.md: add notice of final release and maintenance mode
• c1761dc README.md: update for end of maintenance