Rasmol parser WIP

src/mol-plugin-state/transforms/model.ts

src/mol-script/transpilers/rasmol/parser.ts

src/mol-script/transpilers/rasmol/special.ts

src/mol-script/transpilers/rasmol/special_keywords.ts

src/mol-script/transpilers/rasmol/special_operators.ts

src/mol-script/transpilers/rasmol/special_properties.ts