Latest set of external contributions from IE Test Center. Compared to test\suite\ietestcenter:

- 26 test case modifications.  Most of these involved replacing instances 'window' with the
  global object
- removal of 47 test cases.  The bulk of these were dependent upon 'window' methods or properties
  such as 'document' and 'alert'
- addition of 1,234 new test cases.  These cover the following ES5.1 sections:
	chapter07\7.6\7.6.1
	chapter07\7.8\7.8.5
	chapter11\11.8\11.8.2
	chapter11\11.8\11.8.3
	chapter12\12.6\12.6.3
	chapter12\12.6\12.6.4
	chapter12\12.7
	chapter12\12.8
	chapter12\12.9
	chapter13\13.2
	chapter15\15.10\15.10.2
	chapter15\15.10\15.10.4
	chapter15\15.10\15.10.6\15.10.6.2
	chapter15\15.11\15.11.4\15.11.4.4
	chapter15\15.1\15.1.1\15.1.1.1
	chapter15\15.1\15.1.1\15.1.1.2
	chapter15\15.1\15.1.1\15.1.1.3
	chapter15\15.1\15.1.2\15.1.2.2
	chapter15\15.1\15.1.2\15.1.2.3
	chapter15\15.2\15.2.4\15.2.4.2
	chapter15\15.3\15.3.4\15.3.4.5.1
	chapter15\15.3\15.3.4\15.3.4.5.2
	chapter15\15.4\15.4.4\15.4.4.10
	chapter15\15.4\15.4.4\15.4.4.12
	chapter15\15.4\15.4.4\15.4.4.4
	chapter15\15.9\15.9.1\15.9.1.15