Submodule missing from the release

```
....
Make Error at CMakeLists.txt:11 (message):
  CMake/common missing, run: git submodule update --init
```

I tried both the zip and tar.gz files from the release (lunchbox-1.17.0) and the submodule is not there. I think the release should be complete including the submodules, otherwise it complicates the downstream distro packaging (I am trying to get the package into Fedora).