[RFC] formal upgrade procedure

[arhimede]

We may want to be sure a a certain API project is updated
we may save in a file the current version of the release
each new release will have a new version file which over-write the previous one
contain an instruction file with what to do to implement the updates project wide

[arhimede]

update changelog
https://github.com/dotkernel/api/blob/5.0/CHANGELOG.md

[arhimede]

how do we tell people who cloned this project that there is an update available ?