This commit normalizes the test case format used across test262. It applies the following transformations:

* Convert to YAML for frontmatter
* Remove of trailing whitespace
* Replace /r/n with /n except in chapters 6 and 7.
* Copyright header always uses // comments
* new includes attribute replaces $INCLUDE
* No implicit assumptions about test environment other than $ERROR. Everything else appears in the include array. This includes "runTestCase" which is now included in a substantial number of tests.

Updated copyright notice for 2013.

Fixed a property access in 6.4_c so that the error message shows the correct expected value.

Added tests to verify that constructors in Internationalization API can be called with non-objects as this values.

- Added test for proleptic Gregorian calendar with no year 0.
- Spelled 𠮷野家 correctly with supplementary characters.
- Fixed default value for useGrouping.

- Updated DateTimeFormat tests for new handling of hour12 options property.
- Added a few invalid language tags to test of IsStructurallyValidLanguageTag.
- Added user-defined language tag to test of CanonicalizeLanguageTag.
- Added test for the Intl property of the global object.

- Removed a few old test cases that were redundant with new, more comprehensive ones.
- Added testIntl.js as standard include for all console tests in test262.py – see related bug 574.
- Added .jshintrc file for settings for the JSHint tool.

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.