Mostly functional version of 'Playground mode' Issue #52.  Still need to add support for additional languages, saving/loading of code state, changing the text input, and adding, or removing, new test cases with their own inputs.\nAlso refactored TestResultsListView to make multi-line output columns into a generic component.
Removed dependence on unused file
Merge branch 'master' of github.com:jspacco/CloudCoder