[!104] issue related to gauss-lobatto quadrature rule generated from maxima script

Merge branch 'issue/maxima_script' into 'master'

### Summary

Resolves a bug in gausslobatto.mac script where coefficients are generated
only with double precision instead of high-precision.

Closes [#18]

See merge request [!104]

  [#18]: gitlab.dune-project.org/core/dune-geometry/issues/18
  [!104]: gitlab.dune-project.org/core/dune-geometry/merge_requests/104


Closes #18