cpp: use formatters from the C++ formatters model
agile: try to restore some sanity to sprints

- tagged all iterations whilst in refactor branch
- close all stories in sprint 31, move those we don't intend to work
  on back to backlog
- open release notes for sprint 32
agile: move Split C++ model epic into iteration
agile: split epic into stories for iteration 32
sml to cpp: initial setup of transformation model