add Genetics Home Reference

[nicolevasilevsky]

From @mellybelly on September 16, 2017 14:51

https://ghr.nlm.nih.gov/about/data-files-api
Would be good to have reciprocal links as well as potentially getting content, citations, etc.
@lwinfree @jmcmurry @nicolevasilevsky

Copied from original issue: monarch-initiative/monarch-disease-ontology-RETIRED#392

[lwinfree]

Just emailed them - will update when I hear back!

[lwinfree]

We will be linked on their resources page starting next week!

I think the rest of this issue is about potentially ingesting content from Genetics Home Reference, so I'm assigning @mbrush and @putmantime to look into this.
Thanks!