Rename `String#contains` to `String#includes` as per recent TC39 meeting
Parser.parseTypeReference_() takes no parameter
Format ModuleEvaluationError stacks as source.

Module evalution errors have stacks with line number in to functions bodies not files.
Print the source and indicate the errors by markers in the output.

Review URL: https://api.github.com/repos/google/traceur-compiler/issues/1520

Closes #1520.
Add support for type parameters for classes