Issue#43

[ahaselsteiner]

Implemented an exponentiated Weibull distribution. Many changes were required as the exponentiated Weibull distribution has a second shape parameter and before that we only allowed distributions to have one shape parameter.

[coveralls]

Pull Request Test Coverage Report for Build 327

• 144 of 172 (83.72%) changed or added relevant lines in 4 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.8%) to 86.761%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
viroconcom/distributions.py	91	99	91.92%
viroconcom/fitting.py	47	67	70.15%

Totals
Change from base Build 303:	0.8%
Covered Lines:	924
Relevant Lines:	1065

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💛 - Coveralls