rename refactorings, improve test logging a bit
rework main tests, fix some minor errors
fix and extend mpi test
run isort
Fix a bug in RechenbergOptimizer

I also removed an old and useless example.
add more isolation to tests, some renames
fix blocking around invoke/start queue.
example for tuning RF parameters for wind prediction. but fails after 5th call
another example with saes and wind power prediction, fails after 5 invocations
quick fix for hang with minimal optimizer
Merge branch 'develop' into renke-multi-param

I also simplified the one_{min,max} objective functions using the new
parameter type multi.

Conflicts:
	examples/one_min_gridsearch.py
	metaopt/core/paramspec/util/exception.py
	metaopt/core/paramspec/util/param.py
	metaopt/tests/unit/core/param/param.py