* SoapReflectionImporter.cs: Set the BaseMap property of map. Small fix.

	* SoapReflectionImporter.cs: Set the BaseMap property of map. Small fix.
	* TypeData.cs: IsComplexType now returns true for IXmlSerializable types.
	* XmlAttributes.cs: Fixed bug when reading the value of DefaultValueAttribute.
	* XmlReflectionImporter.cs: Set the BaseMap property of map. Several small fixes.
	* XmlSchemaExporter.cs: Implemented.
	* XmlSchemas.cs: Support schemas with TargetNamespace set to null.
	* XmlSerializationWriter.cs: FromXmlQualifiedName (): return null if the qname is null.
	  GetNamespacePrefix (): no need to add xmlns attribute if namespace is null.
	* XmlSerializationWriterInterpreter.cs: Fixed management of default values.
	  GetStringValue() returns null if the value is null, instead of empty string.
	  (attributes with null values are not written).
	* XmlTypeMapElementInfo.cs: added IsTextElement and IsUnnamedAnyElement properties.
	* XmlTypeMapMemberAttribute.cs: added DataTypeNamespace and removed DataType.
	  DataType value can is now in TypeData.
	* XmlTypeMapMemberElement.cs: Small fix.
	* XmlTypeMapping.cs: Added FindMember method and BaseMap property.

svn path=/trunk/mcs/; revision=16235