Update TP2 tutorials
More tweaking the save dir stuff

- Add a MPSAVE_DIRECTORY variable
- Update sc#addWmpAre and COPY_ALL_GAM_FILES accordingly; ADD_GAM_NPC is
  intentionally left unaltered since it is only available for ancient BG1
- CLEAR_MEMORY reloads SAVE_DIRECTORY and MPSAVE_DIRECTORY
Some fixes to the documentation

- Add changed-by-me notices where missing
- Document MOVE +
- Amend the doc Makefile to replace *! with *_, or the readme will be off
- It's optNoBackup for DELETE, not optGlob
- Update optNoBackup to mention MOVE and DELETE
- Fussy edits to the log_and_prints for MOVE
MOVE falls back onto COPY_LARGE rather than COPY