OpenCRAVAT integration

[malachig]

OpenCRAVAT has these really beautiful variant reports that among other things provide results from a whole collection of variant effect predictors (FATHMM, MutPred, PROVEAN, etc.).

See example here: https://run.opencravat.org/webapps/variantreport/index.html?chrom=chr11&pos=48123823&ref_base=A&alt_base=C

This works off of build38 coordinates. So maybe we can construct such a URL from information obtained from ClinGen Allele Registry once that link is created.