Bug fix crossref schemaLocation.
Merge pull request #163 from gnott/tweaks

Bug fix crossref schemaLocation.
Merge branch 'master' of github.com:gnott/elife-poa-xml-generation into pubmed
Editorial article support by not failing when history is absent.
ORCID for pubmed.
Remove unwanted tags from affiliation and abstract.
Remove email from PoA contrib affiliation.
Convert <italic> to <i> for pubmed.