Class parameter set, the second try

[philippkraft]

No description provided.

[coveralls]

Pull Request Test Coverage Report for Build 614

• 95 of 102 (93.14%) changed or added relevant lines in 3 files are covered.
• 206 unchanged lines in 11 files lost coverage.
• Overall coverage increased (+0.1%) to 88.669%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
spotpy/parameter.py	41	48	85.42%

Files with Coverage Reduction	New Missed Lines	%
spotpy/algorithms/demcz.py	1	61.27%
spotpy/algorithms/fscabc.py	1	80.88%
spotpy/database.py	2	86.96%
spotpy/algorithms/sceua.py	2	88.89%
spotpy/parameter.py	3	94.91%
spotpy/algorithms/dream.py	11	89.22%
spotpy/unittests/test_fast.py	11	85.0%
spotpy/unittests/test_describe.py	15	95.0%
spotpy/unittests/test_gui_mpl.py	25	93.75%
spotpy/describe.py	58	90.22%

Totals
Change from base Build 613:	0.1%
Covered Lines:	4875
Relevant Lines:	5498

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💛 - Coveralls