Added tests for requirements imposed on the built-in objects of the ECMAScript Internationalization API Specification by the introduction of chapter 15 of the ECMAScript Language Specification.
- Removed some old tests that were redundant with the new tests.
- Added testBuiltInObject.js as standard include for all console tests in test262.py – see related bug 574.

- Removed LocaleList tests; updated other tests so they don't depend on LocaleList.
- Updated tests so they no longer assume that the prototype object of a constructor is an instance of that constructor.
- Updated tests so that jshint is happy.
- Removed @path attributes from test files; updated comment in packager.py explaining why they're unnecessary.
- Removed "use strict" statements, which interfere with strict/non-strict testing.
- Removed testcase functions, which are unnecessary.

All Microsoft-contributed *.js and *.py sources now have Ecma's copyright header.