Report debate progress

[Mateusz-Dobrzynski]

Debate tools already track debate status. It can be reported back to tau.

TO-DO:

• Add more URL params (see Debate configuration links #107):
  • Debate ID,
  • Server address.
• Every time a debate stage changes, a request to the server must be made. The request must update the debate progress to reflect the app state.

Security:

• Performing a request will still require authentication. The assumption is, the marshal will launch debate tools in the same browser window, meaning they will have a cookie to authenticate with. On a failed request, no errors should be presented to the user.