GSoC 2021 PD to AF conversion facility in Newt

Full report: https://gist.github.com/acanalpay/7331af0109078602729da24a1f41b584

Code, PR and Issue Links

• In the Newt repository, I worked on the unstable branch. My PR for the unstable branch is here. The individual commits can also be viewed on that link.
• For the Conversion Server, Docker image can be found here.
• The web service can be found on the repository here.
• Encountered issues while testing the code can be found here. The related commits can be found on that link as well.
• The PR and related commits for SBGNViz.js library can be found here.