Licenses rework

[mmaelicke]

There are some fundamental questions, that I am not happy with. I included a set of licenses into the default list of licenses. But I also included noDerivative (ND) and NonCommerical (NC) licenses. I am not even sure about using the ShareAlike (SA) licenses. ND and NC are considered to be non-free licenses as particular kinds of usage are not allowed. As far as I know, ND would mean that any kind of remixing and building on the data is not allowed. Thus if a user downloads data, he would not be allowed to share or publish i.e. a modeling result. Even with SA I am not sure, although used all over the place. If I use data to make a graph, I have to share the graph with the same or an alike license. If the graph is published i.e. in HESS, it is published under a by attribution only license and anyone could use and distribute it under other terms (like NC). Thus the user would have to request permission every time he uses the data....

[codecov[bot]]

Codecov Report

Merging #86 into master will increase coverage by 0.29%. The diff coverage is 35.71%.

@@            Coverage Diff             @@
##           master      #86      +/-   ##
==========================================
+ Coverage   43.24%   43.54%   +0.29%     
==========================================
  Files          39       39              
  Lines        1466     1479      +13     
==========================================
+ Hits          634      644      +10     
- Misses        832      835       +3     

Flag	Coverage Δ
#e2e	43.54% <35.71%> (+0.29%)	:arrow_up:

Impacted Files	Coverage Δ
metacatalog/api/add.py	44.04% <0.00%> (-0.54%)	:arrow_down:
metacatalog/models/license.py	60.00% <41.66%> (-10.84%)	:arrow_down:
metacatalog/db/migration.py	87.50% <0.00%> (+25.00%)	:arrow_up:

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