Handle _this variable collision because of capturing this expressions
Test updates
Fix Typewriter baselines for multi-file tests
Report errors when continue/break statements are used improperly.

continue statements must be within an iteration statement.
continue statements with a target must reference a target of an iteration statement.

break statements without a target must be in an iteration or switch statement.
break statements with a target must reference an enclosing labeled statement.

break/contiue targets cannot cross a function boundary.
labels cannot use the same name as an enclosing label.
Update code based on review feedback.
Code review feedback.
Error to define _super in derived class methods, constructor, properties and accessors
Report error if expression resolves to compiler defined _this or _super declaraiton
It is error to use _super or _this as parameter names if they collide with compiler generated ones.
Some refactoring and negative tests for the conflict with compiler generated _this and _super
Some more code review feedback
Add test runner for validating large realworld projects and some infrastructure.
Update RWC runner to use baselining infrastructure.