Add libraries needed for debugging: forked CS and source-map.
Add debug support to the IDE (chrome-specific).
Merge branch 'master' into debugger

* master:
  Simplify Let's Play URLs so they work with the devserver, and so you can see the link on the status bar before you click.
Renamed ide.bind to ide.bindframe for clarity.
Merge pull request #7 from PencilCode/debugger

Add preliminary debug facilities to the IDE