diegoquinteiro

We are excluding the `class` attribute of selected DOM elements. Some of the rules e.g. `H1Rule` expects the `class` attribute to be used to set properties. To solve this issue...

Support properties with `type` `exists` like `related.sponsored` below: ``` (javascript) { "class": "RelatedItemRule", "selector": "li", "properties": { "related.sponsored": { "type": "exists", "selector": "li", "attribute": "data-sponsored" }, "related.url": { "type": "string",...

Some of the default rules defined in the SDK use XPath selectors. Should we also add support for them? Example: ```(javascript) { "class": "InstantArticleRule", "selector": "head", "properties": { "article.canonical": {...