Merge branch 'commit_f2' into 'master'
Commit function The ROSS API has changed to add a commit function (see [d3bdc07](https://github.com/carothersc/ROSS/commit/d3bdc077a0c4d1481dc06c4b4d4f1eb8e4e6fbf6)). This merge request updates the various CODES models to the latest ROSS API. All test pass. It also updates the documentation to CODES v 0.5.2 and ROSS v d3bdc07. See merge request !5