The `fnExists` function defines a generic way to determine if any number
of values are function instances. Because it is only used by a single
test, the additional complexity required by the generalized code (and
the organizational drawbacks to maintaining another "include" file) are
not justified. Remove the file and update the test to assert the
function's existence directly.

- Add missing noStrict flags when tests explicitly require non-strict semantics (e.g. unqualified delete, with statement)
- Change `throw new Exception(...)` to `$ERROR(...)` in call/*
- Replace dynamic strict mode check with noStrict flag in call/11.2.3-3_8
- Align assignment/11.13.1_A3.1 with 11.13.1_A3.2 to avoid creating implicit global variable
- Split test into multiple files when undeclared variable are under test
  - addition/S11.6.1_A2.4_T3
  - division/11.5.2_A2.4_T3
  - does-not-equals/11.9.2_A2.4_T3
  - equals/S11.9.1_A2.4_T3
  - greater-than/S11.8.2_A2.4_T3
  - greater-than-or-equal/S11.8.4_A2.4_T3
  - in/S11.8.7_A2.4_T3
  - instanceof/11.8.6_A2.4_T3
  - left-shift/S11.7.1_A2.4_T3
  - less-than/S11.8.1_A2.4_T3
  - less-than-or-equal/S11.8.3_A2.4_T3
  - modulus/S11.5.3_A2.4_T3
  - multiplication/11.5.1_A2.4_T3
  - right-shift/11.7.2_A2.4_T3
  - strict-does-not-equals/11.9.5_A2.4_T3
  - strict-equals/11.9.4_A2.4_T3
  - subtraction/11.6.2_A2.4_T3
  - unsigned-right-shift/11.7.3_A2.4_T3
- Add declaration when implicit global variable creation not part of the test
  - assignment/11.13.1_A4_T1
  - compound-assignment/S11.13.2_A3.1_T*
  - compound-assignment/S11.13.2_A3.2_T*
  - grouping/11.1.6_A3_T5
  - instanceof/S15.3.5.3_*
- Split test into multiple files when unqualified delete is used
  - delete/S11.4.1_A2.2_T1.js
  - delete/11.4.1_A3.2
  - grouping/S11.1.6_A2
  - grouping/S11.1.6_A3_T6

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.

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

77 new (mostly) strict mode tests plus the removal of one invalid test case.

Sputnik and IE Test Center tests now live side-by-side in ch* directories under test/suite.

source starting NOW, to test/suite.

assertTrue became assertTruthy. Canonical form of doc-comment attribute value source no longer have a leading colon and trailing semicolon. Any existing such are stripped during conversion.

style to append runTestCase(funcName); rather than
assertTrue(funcName.call(this)), giving the testing framework more
control.

- 12.14-7.js:  cleaned up
- 15.2.3.3:  89 test case additions
- 15.2.3.4:  29 test case additions
- 15.2.3.6:  1,076 test case additions and 15 minor test case fixes
- 15.2.3.9-1.js:  cleaned up
- 15.3.4.5-2-8.js:  cleaned up
- 15.4.4.14:  14 test case additions and 3 minor test case fixes
- 15.4.4.15:  9 test case additions and 3 minor test case fixes
- 15.4.4.17:  1 test case additions and 1 minor test case fix
- 15.4.4.18:  1 minor test case fix
- 15.4.4.19:  1 test case addition and 2 minor test case fixes
- 15.4.4.20:  3 minor test case fixes
- 15.4.4.21:  1 test case addition and 1 minor test case fix
- 15.4.4.22: 2 minor test case fixes
- 15.9.4.4: 2 minor test case fixes
- 15.9.5.43-0-2.js: minor test case fix

- external\contributions\: test contributions to Test262 from external entities such as Microsoft and Google.
                           This directory consists of the external tests without any modifications
- test\harness\:  test harness used to run Test262 tests.  Presently web-based
- test\suite\:    suite of vendor-neutral ECMAScript test cases conforming to the ES5 spec
- tools\:         among other things this includes a set of tools used to convert various external test
                  contributions to a format the Test262 test harness can consume
- website\:       an archived copy of the http://test262.ecmascript.org website