For some reason ensembl-io test ontology database went out of sync some
time prior to release 97. See the discussion of PR #85.

Source: release/98 branch of ols-ensembl-loader and master branches
of all other relevant Ensembl repositories, pulled a few minutes ago.
Compara, Variation and ontology schemas all have already been bumped to
version 98.

README: Use the same badge syntax as for 'ensembl'

i.e. explicitly specify the branch

ancestral_allele update to handle Variation API changes.

[ENSCORESW-3077] Travis: Unify configuration of Slack notifications

ensembl Utils::IO into ensembl-io

Looks good to me, the errors are related to th changes to the schema in the ensembl repo which is fixed in a separate PR.

Check response status code instead of message for file fetch requests