Implement against ACT Rules

[EmmaJP]

The W3C has a task force and community group working on rules for testing against WCAG guidelines. Complying with BBC Mobile Accessibility Guidelines should mean that a product is also compliant with most of WCAG 2.x AA standard.

It is possible to use the test cases within the ACT Rules to check that a test tool is producing the correct results. These test cases are not dissimilar to the "given" code examples in the bbc-a11y feature files.

It would be great if someone could look into whether or not it is possible to implement checks against ACT Rules within bbc-a11y, and how much effort it would involve to try and implement against one test rule, eg. HTML page has title: https://act-rules.github.io/rules/2779a5

More details at:
Rules format: https://www.w3.org/TR/act-rules-format/
Implementations: https://act-rules.github.io/pages/implementations/overview/