first working version of PADDS

[coveralls]

Pull Request Test Coverage Report for Build 686

• 289 of 318 (90.88%) changed or added relevant lines in 8 files are covered.
• 18 unchanged lines in 5 files lost coverage.
• Overall coverage decreased (-0.3%) to 91.222%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
spotpy/unittests/test_padds.py	46	51	90.2%
spotpy/algorithms/_algorithm.py	36	42	85.71%
spotpy/algorithms/padds.py	198	216	91.67%
<!--	Total:	289	318	90.88%	-->

Files with Coverage Reduction	New Missed Lines	%
spotpy/algorithms/_algorithm.py	1	86.41%
spotpy/algorithms/sceua.py	2	87.84%
spotpy/unittests/test_algorithms.py	4	93.62%
spotpy/algorithms/demcz.py	5	91.8%
spotpy/algorithms/dream.py	6	89.22%
<!--	Total:	18		-->

Totals
Change from base Build 685:	-0.3%
Covered Lines:	5716
Relevant Lines:	6266

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💛 - Coveralls

[thouska]

This pull request needs a clean up, so that only the relevant files for the algorithm will be mergded and not the whole set for the matlab testing cases.

[bees4ever]

@thouska I fixed it