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More cart tests in AmazonPAS.

	Add	/trunk/_tests/pas/cart_clear.phpt	diff
	Add	/trunk/_tests/pas/cart_clear2.phpt	diff
	Add	/trunk/_tests/pas/cart_get.phpt	diff
	Add	/trunk/_tests/pas/cart_get2.phpt	diff
	Add	/trunk/_tests/pas/cart_modify.phpt	diff
	Add	/trunk/_tests/pas/cart_modify2.phpt	diff
	Add	/trunk/_tests/pas/cart_modify3.phpt	diff
	Add	/trunk/_tests/pas/cart_modify4.phpt	diff
	Add	/trunk/_tests/pas/cart_modify5.phpt	diff
	Add	/trunk/_tests/pas/help_cart_clear.php	diff
	Add	/trunk/_tests/pas/help_cart_get.php	diff
	Add	/trunk/_tests/pas/set_locale8.phpt	diff
	Modify	/trunk/pas.class.php	diff