Improve build system utilities for release time
Submitted by Travis Reitter
Telepathy-glib has some nice build system machinery for automated release checking and production. There are a lot of handy errors in case anything is wrong with the release.
It even generates the release email from the NEWS file.
Since there's a lot of work to get a release done right, anything we can do to simplify it for the person doing the release is a good idea.
Let's copy the rest of the relevant tp-glib release machinery (we already copied a little for the documentation uploading).
Version: git master