add debug console to webapp

![screen shot 2014-11-24 at 12 36 40 pm](https://cloud.githubusercontent.com/assets/5429146/5172651/9bed47ae-73d6-11e4-98a2-873017f7e0b5.png)

* Added a debug console to webapp
* you can now inspect variables, call functions, and evaluate javascript in the context of your running program
or does the evalInterpreter share a copy of the running program's state?