Compilation fails when model contains a chooser with a list literal as the default 

Originally posted as https://github.com/NetLogo/Tortoise/issues/111

To reproduce:

1. Create a model.
2. Add a chooser.
3. Add `[1 2 3]` as an option.
4. Select `[1 2 3]` and save so that it's the default.
5. Attempt to compile the model with Tortoise. (`CompiledModel.fromNlogoContents` is the easiest, but you could use `Compiler` directly too)

Result: `Expected a literal value.`

It works totally fine when the list literal is anything but the default value. It's completely usable by the model and such. We must be parsing the defaults differently I guess.