- [PRINT/print.cfg] - replace duplicated files
- [ MATCH/replace.cfg  ] added func: replace() for replacing a string in multiple files
- [replace.cfg] + test passed
- [ added new module: ] - KOANS - for adding riddles and to play more and to store more distinctions
- [ RUNNER: think_small.sh ] - cleaner + add folder LIST/ROOMS/ for supporting multiple task lists.
- [ update directory structure ] - unit SERVICE/ and RUNNERS/ under STEPPER/