[cmake-developers] RFC: add version to project() call

[Stephen Kelly]

Alexander Neundorf wrote:
> This is now in the AddVersionToProjectCommand branch on git stage.
> 
> Please have a close look at it.

The documentation is not formatted correctly as rst.

> I.e. it could happen when the version number of a sub-project changes,

Generally for cmake, things that require user action on user-managed code to 
invoke behavior change (such as updating dependencies) are fair game for 
behavior change and it is not expected for cmake to handle that.

Thanks,

Steve.