message: Updated build script to install package form pip source distribution.
diff: -# Update pip
  +# Update pip and setuptools
  pip install pip --upgrade
  +pip install setuptools --upgrade
  # Install cython separately
  pip install cython
  @@ -15,6 +16,14 @@ cythonize mbtrwrapper.pyx -X language_level=3
  cd ../libacsf/
  cythonize acsfwrapper.pyx -X language_level=3
  -# Install the package itself
  -cd ../../
  +# Make a source distribution
  +cd ../..
  +python setup.py sdist
  +
  +# Install the package itself from the newly created source distribution (this
  +# way the distribution validity is also checked)
  +version=`python setup.py --version`
  +cd dist
  +tar xvzf dscribe-$version.tar.gz
  +cd dscribe-$version
  pip install .
  