See https://stackoverflow.com/a/10334095/2018314 for details on sharing
resources among multiple projects in a solution.

The second colon (:) has strange effects in the "Output" window of
VisualStudio, messing up the text alignment.

There is no need to have this only as a post-build event, providing it
at this stage will allow us to include it in the assembly information.

Plus also check if the repository's commit state is dirty and report
accordingly.