Refactor the code from Manuel Rexer

Overall refactoring of the code and creation of tests that also could be used to validate other implementations.

@manuel.rexer Please give overall feedback and I'm unsure if I described the 'propagateSysUncToFreqDomain(...)' and 'calculateSysUncInFreqDomain()' correctly. So please have a closer look at the docstrings of those two functions and correct me if I have described something wrong. Also please check the README.md if you are happy with the structure and the content and if something important is missing.
Thanks.

I didn't implement the test of the data structure since It can be controlled by hand easily. But If there should be advances in the use of RDF in calculation packages/software we should come back to it and implement it.

Open TODOs:

1. The main function is quite short. Should I still leave in the short code example on how to use it? I think a real world example with a plot of a data signal would be quite cool.
2. Should I add a short documentation of the output variable 'result_struct' that the user knows what it contains and how to use it? If yes, I'm going to use a picture with some kind of directory-tree structure
3. The repository still needs a license

If you are happy with the current state you can do the merge-request by yourself.
I will open a new one for the documentation and the license.

requested review from @manuel.rexer

assigned to @sebastian.neumeier

changed the description

The Script TestDataStruct.m is not required, isnt it? Please delete. The Rest fits perfekt.

License file must be added

added 1 commit

• 4890fb50 - Add license.

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added 3 commits

• f00806cd - Remove the testDataStructure.m file since it isn't needed anymore
• a26aff7c - Add second author to the LICENSE file
• 9d0ec8cf - Update the README.md file by a 'Improvement Suggestions' list

Compare with previous version

merged

mentioned in commit 3a853f85