Resolve "Implement caching in WaveformGenerator.__parameters_from_source_model"

assigned to @moritz.huebner

added 21 commits

b8c89ef0...68da1c31 - 21 commits from branch master

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added 2 commits

aed52185 - Moved `infer_parameters_from_function` function here because it is used both in…
765ec13b - Now uses a utils function

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added 50 commits

5dd4ab71 - Introduced `Analytical1DLikelihood`
e994f0be - Adapted GaussianLikelihood to new super class
2bccd550 - Adapted PoissonLikelihood to new super class
8ff37914 - Adapted ExponentialLikelihood to new super class
84fc009f - Adapted StudentTLikelihood to new super class
c68b5016 - Some further simplifications and file reformatting
68205a4c - Made the new Likelihood class private because the user should never use it
1e2e4d96 - Made model_parameters a write only attribute
b516a47b - Made func a read only property
81dcc883 - Renamed self.function -> self.func
6f28d5bd - Refactored N -> n (PEP8)
62cc3229 - Made the tests run properly
d6feb0a3 - Made Analytical1DLikelihood public again
071fcbdd - Removed an alias and refactored a key
21ecf70c - Reformatted file
d2990851 - Deleted redundant tests
5cbdd850 - Split a test into two
e359092c - Added tests for Analytical1DLikelihood
2be27fac - Extracted two private methods
964e86b8 - Refactored code some more in GaussianLikelihood
7e7795f7 - Refactored code some more
dde1ee41 - Shifted y setting logic into a property/setter structure
2ac8f384 - Added check that x, y in Analytical1DLikelihoods are always numpy arrays
53871d3f - Created two properties for the rate and the sumlogfactorial respectively.…
e59da276 - Renamed a property
d6127a83 - Fixed a bug I just introduced
42a042c2 - Introduced a mu property and simplified ExponentialLikelihood
8d106493 - Some more reformatting
280fd8fb - Moved the calculation of the residual into the parent class
3bfac960 - Refactored some more
3e43896d - Removed the residual aliases and replaced them accordingly
6fb97e69 - Added the possibility of x or y being a single float
130ddc5c - Added some docstrings
a4c837a9 - Added some more docstrings and refactored some more
17d04bf1 - Fixed errors I introduced myself
251472b9 - Removed some of the slower and unnecessary properties
faf745d3 - Renamed function -> func
dcd3be7b - Added tests for Likelihood base class
21f2372c - Added tests for setting x and y
a40c6ea5 - Made logic a bit safer for obscure data types
75705732 - Simplified test syntax
ed41d915 - Tests cases of `PoissonLikelihood`
7ca8c69c - Corrected an incorrect cast
61cc31c2 - Tests cases of `ExponentialLikelihood`
f833301b - Added test for default case of `ExponentialLikelihood.log_likelihood`
06261851 - Changed a comment
38cc1332 - Added some more tests for 100 % coverage.
cbe52f8f - Made a check python 2 friendly
e9ca92f6 - Merge branch '157-simplify-likelihoods' into…
a2e38e73 - Replaced Analytical1DLikelihood._infer_parameters_from_function with utils…