Add 'score' attribute to 'Delta' object

[johnmhoran]

Expands issue #3 (match scoring).

[steven-esser]

A simple, hard-coded score is probably fine for now during delta creation.

[johnmhoran]

@MaJuRG In a few minutes I'll push my initial commit for this issue so you can vet my approach thus far. I have not yet addressed the CSV output -- that'll be next -- but I have tackled the JSON output and refactored 11 failing tests. All 137 tests pass. (Also, I've left my comments/commented code in place for now.)

One question I have: was it correct to set a default value of 0 (rather than, e.g., None), for the new score attribute in the Delta object?

As a starting point, here's the scoring scheme I've hard-coded for the various values of the Delta.category attribute:

added: 75
license info added: 70
license info removed: 65
license change: 60
modified: 50
removed: 25
moved: 0
unmodified: 0

[steven-esser]

@johnmhoran 0 is fine for default; those hardcoded values are fine for now

[johnmhoran]

@MaJuRG On reflection, perhaps it would be better to assign the scores by adding a method to the Delta class rather than the scattered approach I've initially taken?

[steven-esser]

@johnmhoran Yes it would be; Though that should be a separate ticket as there is some to discuss.

[johnmhoran]

👍

[johnmhoran]

@MaJuRG 15 failing tests, making my way through them.

[johnmhoran]

@MaJuRG Missed cleaning some comments. Cleaning now.