Fix parameters order of `Supports.keyword()` and  `Supports.unit()`
Rename `theseTests` to `featureList`
`Test` member variable: Rename `tests` to `spec`
Rename `feature` to `featureName`
Rename `getTest()` to `getSpecTest()`
Refine even more Test#createFeatureList()
Refine still more main.js

* Refine still more Test#createFeatureList()
* Replace `featureInfo` with `feature` member variable
* Add Test#getFeatureSection()
Fix a class name
Remove unused class