Augment FEEL AST node at compilation with standard return type

2017 Week 24-25, 2017 Week 26-27, 2017 Week 28-29, 2017 Week 30-31, 2017 Week 32-33, 2017 Week 34-35, 2017 Week 36-37, 2017 Week 38-39, 2017 Week 40-41-42, 2017 Week 43-44, 2017 Week 45-46, 2017 Week 47-48, 2017 Week 49-50, 2017 Week 51-52, 2018 Week 01-02, 2018 Week 03-04, 2018 Week 05-06, 2018 Week 07-08, 2018 Week 09-10, 2018 Week 11-12, 2018 Week 13-14, 2018 Week 15-16, 2018 Week 17-18, 2018 Week 19-22, 2018 Week 23-24, 2018 Week 25-26