message: add IDEA for better debugging to readme (unrelated to PR really)
diff: @@ -18,6 +18,7 @@ This repository contains tests for the matrix-react-sdk web app. The tests fire
  - Run 2 synapse instances to test federation use cases.
  - start synapse with clean config/database on every test run
  - look into CI(Travis) integration
  +- create interactive mode, where window is opened, and browser is kept open until Ctrl^C, for easy test debugging.
  ## It's broken! How do I see what's happening in the browser?
  