The cron build for all python versions failed with:
Obtaining bottle from git+https://github.com/bottlepy/bottle@release-0.12#egg=bottle (from -r /home/travis/build/IIIF/image-validator/.tox/requirements-dev.txt (line 1))
Cloning https://github.com/bottlepy/bottle (to revision release-0.12) to ./.tox/py35-dev/src/bottle
Did not find branch or tag 'release-0.12', assuming revision or ref.
error: pathspec 'release-0.12' did not match any file(s) known to git.
Command "git checkout -q release-0.12" failed with error code 1 in /home/travis/build/IIIF/image-validator/.tox/py35-dev/src/bottle
ERROR: InvocationError for command '/home/travis/build/IIIF/image-validator/.tox/py35-dev/bin/pip install -r /home/travis/build/IIIF/image-validator/.tox/requirements-dev.txt' (exited with code 1)
The cron build for all python versions failed with:
see, e.g. https://travis-ci.org/IIIF/image-validator/jobs/457299187