Mostly functional version of "Playground mode".  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.

Also 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
added changed to default.deps
Merge branch 'master' of github.com:cloudcoderdotorg/CloudCoder

Conflicts:
	default.deps
added a .gitignore to make CloudCoderBuilder2 ignore lib/cachedir