Restore GERP annotations

[alkc]

Description and reviewer info

This update restores the GERP convservation score from dbNSFP/VEP

Fixes #205

Might have to wait until #191 is merged.

This update does not restore GERP to the rank models, might be a better idea to do it as a part of #191 or as a minor patch after #191 has been merged into master.

Type of change

• Documentation
• Patch
• Minor change
• Major change

Checklist

• Self-review of my code
• Update the CHANGELOG
• Tag the latest commit (vX.Y.Z format)
• Log samples used for testing in the Verification_samples_log Excel sheet
• GERP_RS scores added in CSQ fields for SNVs/indels
• GERP score extracted into INFO-field by modify_scout_vcf.pl

Documentation

• At least one other person has reviewed my changes (not required for trivial changes)

Patch

• Stub run completes without errors or new warnings
• At least one other person has reviewed and approved my code (not required for trivial changes)

Major / Minor change

• Stub run completes without errors or new warnings
• onco run finishes without any new warnings/errors and the results can
  be loaded into scout
• wgs single run finishes without any new warnings/errors and the results
  can be loaded into scout
• wgs trio run finishes without any new warnings/errors and the results
  can be loaded into scout
• At least one other person has reviewed and approved my code
• I have made corresponding changes to the documentation (software versions, etc.)

Test/review documentation

Review performed by

• Alexander
• Jakob
• Paul
• Ryan
• Viktor

(Add if missing)

Testing performed by

• Alexander
• Jakob
• Paul
• Ryan
• Viktor