dbNSFP: fix indexing for hg19, move to academic
dbNSFP: fix indexing for hg19, move to academic

- Fixes indexing for hg19 since the columns changed in recent versions.
  Thanks to @matthdsm. Fixes #1571
- Moves to use academic version instead of commercial so academic
  users can take advantage of additional fields.

rchekaluk/cloudbiolinux,chapmanb/cloudbiolinux,rchekaluk/cloudbiolinux,rchekaluk/cloudbiolinux,rchekaluk/cloudbiolinux,chapmanb/cloudbiolinux,chapmanb/cloudbiolinux,chapmanb/cloudbiolinux