…rt code for students for new feature

Merge Cucumber Exercises into Master

This is the start of the lab on acceptance testing. So far it covers the
basics of puppeteer and basic profiling.

Cucumber Updates

Removed Activity section from README, deprecated

Some students were getting confused about how to solve task 4.2.4

The instructions should now make it easier for them to solve the problem.

The number of lines per function was too short.
The linter didn't pick up on poor brace positioning.

Linter now fixed.

The step definition file contained a lot of helper code.

The page object is now instantiated using a custom object.
A several helper functions removed and code moved to steps.

manifest still had a lot of scripts that were no longer needed.

These have now been removed.

…bsites

Scenario bug