Resolve "ParallelError in dune-grid Python bindings with OpenMPI"

Closes #346 (closed)

added 2 commits

• a4e421b8 - fix a bug in recent change in 'make' and 'remove' command in dune.__main__.py
• 75621110 - try turning around the logic of checking and initializing mpi in python

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added 1 commit

• fce2de32 - try turning around the logic of checking and initializing mpi in python

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added 3 commits

• fce2de32...a5e4e79a - 2 commits from branch master
• f6faf141 - try turning around the logic of checking and initializing mpi in python

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assigned to @andreas.dedner

merged

mentioned in commit c74888f2