2008-05-13  Atsushi Enomoto  <atsushi@ximian.com>

	* DataTableExtensions.cs : implemented AsEnumerable().
	* DataRowExtensions.cs : implemented.
	* EnumerableRowCollection_1.cs : implemented.
	* EnumerableRowCollectionExtensions.cs :
	  implemented Select() and Where().
	* OrderedEnumerableRowCollection.cs : base is not parameterless now.
	* TypedTableBaseExtensions.cs:
	  some overloads can just delegate to others.
	* DataRowComparer_1.cs : (added some non-working code.)

2008-05-13  Atsushi Enomoto  <atsushi@ximian.com>

	* DataRowComparer.cs, DataRowComparer_1.cs, DataRowExtensions.cs,
	  DataTableExtensions.cs, EnumerableRowCollection.cs,
	  EnumerableRowCollectionExtensions.cs, EnumerableRowCollection_1.cs,
	  OrderedEnumerableRowCollection.cs, TypedTableBase.cs,
	  TypedTableBaseExtensions.cs : stubbed all.