adds more detailed info to Node wrapper response

[AndriusA]

Check the updated README for usage example - both the client and the check call have an extra debug = true parameter:

• the one in the client retains string representation of rules
• the one in the check returns detailed information object rather than only true or false for a match

[AndriusA]

Node repl output as an example of use:

> const AdBlockClient = require('adblock-rs');
>
> let rules = fs.readFileSync('./data/easylist.to/easylist/easylist.txt', { encoding: 'utf-8' }).split('\n');
>
> const client = new AdBlockClient.Engine(rules, true);
>
> const serializedArrayBuffer = client.serialize(); // Serialize the engine to an ArrayBuffer
>
> console.log("Matching:", client.check("http://example.com/-advertisement-icon.", "http://example.com/helloworld", "image", true))
Matching: {
  matched: true,
  explicit_cancel: false,
  redirect: null,
  exception: null,
  filter: '-advertisement-icon. <+> /icon_ad. <+> /icon_ads_ <+> /icon_advertising_'
}
> console.log("Matching:", client.check("https://github.githubassets.com/assets/frameworks-64831a3d.js", "https://github.com/AndriusA", "script", true))
Matching: {
  matched: false,
  explicit_cancel: false,
  redirect: null,
  exception: null,
  filter: null
}
> console.log("Matching:", client.check("http://example.com/-advertisement-icon.", "http://example.com/helloworld", "image"))
Matching: true
>