Console Runner: Formally Deprecate

Document the console runner's "deprecated" status. Move the
documentation to a less central location in the project's file hierarchy.

CONSOLE-RUNNER.md → tools/CONSOLE-RUNNER.md

 ## Using the Console Test Runner
 
+**Note** This utility has been deprecated. It will not be updated with new
+features; future changes will be limited to bug fixes only.
+
 The console test runner is used to test browserless implementations of ECMAScript, e.g., [v8](http://en.wikipedia.org/wiki/V8_(JavaScript_engine)), [node](http://en.wikipedia.org/wiki/Node.js), or [js24](http://packages.ubuntu.com/trusty/libmozjs-24-bin) 
 
 ### Requirements