With this commit the support for Turbine is completly revised. From now
on Turbine is supported via a separate module and is integrated as top
level view.

closes #306

closes #299

The 1.4.0 release was a total disaster. Webpack didn't build the css correctly
because of travis using an ancient nodejs version.

Remove the git-commit-id-plugin from the sample and don't fail in docs when the
sources are not located in an git-repository (e.g. downloaded from zip)

I did an accidental release of a 1.3.2, so we need another increment