docs: update README with CS2 build and other small updates (#1267)
docs: update README with CS2 build and other small updates (#1267)


decaffeinate/decaffeinate,alangpierce/decaffeinate,alangpierce/decaffeinate,eventualbuddha/decaffeinate,eventualbuddha/decaffeinate,decaffeinate/decaffeinate,alangpierce/decaffeinate