This reverts commit 60bc404d95.
master branch is for master gnome-shell, which is 3.0.1 and unstable.
gnome-3-0 branch is for stable shell, and has 3.0 for everything
which is supported by shell developers.
Next time, please ask me before committing.
Extensions that use public Shell API are expected to work for all
stable 3.0 releases, so we skip setting the minor version. (This
means that they'll work in 3.0.0 and 3.0.1 without rebuilding).
Notably absent are auto-move-windows and windowsNavigator, that
hook deep into Shell code and could be broken by next minor release.