Merge pull request #5454 from RosettaCommons/20210606_Hansen
[Foldit] Add Lua Functions for GetABEGOColor
Release notes:
- Added Lua function GetABEGOColor() which takes a residue number and returns its ABEGO color as a letter
- Added Lua function GetABEGOColorAll() which returns a table of residue numbers mapping to their ABEGO color as a letter