Allow Passing of Domain and Workshop Name via ? Parameter in URL

[ajacocks]

Let's add the ability to set workshop(and possibly student ID) via parameter in the URL.

[goozbach]

Interface suggestion: http://redhatgov.io/workshops/containers_101/?student_id=32&domain=fiercesw.network&workshop=raytheon-containers

The implementation should read the query params, and write the cookie.

Also the change the function called upon pressing "enter" button to update the URI with proper query params.

Might want to append the query params to all the forward/backword links as well.