Submodule cmake-common should be included in the release package

[yarda]

Submodule cmake-common from the Eyescale should be included in the release tar.gz package, otherwise it's quite hard to package it downstream. I am trying to get this package into Fedora.

[umlaeute]

I agree that it would be great if there were usable tarballs that do not require git and network-access when building.