Implement page.route to abort unnecessary requests

[ankur22]

Feature Description

As mentioned in #371, there could be a need to block out requests which just create noise in the results -- we're thinking requests that track user flow and adverts which might not be useful to see in the results.

Suggested Solution (optional)

What could be implemented in page.route, to allow the user to add urls to intercept and abort.

Already existing or connected issues / PRs (optional)

Compliments #371