[ENH] Add Swale Scoring Model

[aadya940]

Related to: #425

Implemented as per this paper, Section 5.

Couldn't verify the correctness due to a lack of alternate implementations. I shall continue to work on this once we track down an alternate implementation?

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[MatthewMiddlehurst]

Is this ready to go? There seems to be a conflict currently. People are less likely to look at drafts 🙂.

[aadya940]

@MatthewMiddlehurst From my side this looks ready to go. However, I'm not 100% confident about the logic used. We should check this up against an alternate implementation (which I couldn't track down) if something looks wrong to you. :-)

[TonyBagnall]

thanks for this, I missed it. I will look for an implementation, probably one in matlab. There is a conflict with test_expected_results though

[TonyBagnall]

so the implementation is true to the definition in the paper, but I dont think defining this recursively is a good idea. It would be better if it followed the model used by LCSS. @chrisholder and I will take a look and get back to you

[MatthewMiddlehurst]

There seems to be a conflict which has to be resolved, but @chrisholder has approved so this should be quick to merge after given him and @TonyBagnall have no issues with it.