Static files do not get installed when installing from checkout

[piotr-dobrogost]

When installing from checkout like this
pip install https://github.com/Kotti/kotti_navigation/archive/0.3.1.zip
static files are not being installed.
The reason is they are absent from wheel which is being built in the process of installation by pip. The root cause is a mess in python world in regard to packaging data. See pypa/sampleproject#30 and links therein.
The solution seems to be using MANIFEST.in file.

[disko]

Or using setuptools-git when packaging.