EuroPMC bibtex citation import to Fidus

[mrchristian]

See first if this service works for health researchers and workers. PT to test.

feed using https://pypi.org/project/pubmed-bibtex/ - we need public health and medical citation feed into Fidus

[mrchristian]

https://pypi.org/project/pubmed-bibtex/

bibtex library added and working in Fidus. We'll keep the issue while testing goes on