[PATCH 05 of 22] buildrpm: simpler and better versioning scheme and changelog

[Mads Kiilerich]

It would be nice if we had better support and "best practice 
documentation" for automatic versioning of builds from repositories, 
both if they used "semantic versioning" and other numbering schemes.

latesttag and latesttagdistance brings us a bit of the way ... but 
setup.py shows that it still requires a lot of scaffolding.

The scheme I use here is mostly compliant with 
http://fedoraproject.org/wiki/Packaging:NamingGuidelines#Package_Versioning 
.

/Mads