Specify the namespace of an Extensions element.
Add Extensions element to RequestAbstractType.
Remove custom tag of a Signature element in a RequestAbstractType, because it's the default.
Add SAMLP Extensions element to RequestAbstractType complex type.
Rename the existing Extensions element and set the correct namespace, because it is used for metadata.
Merge pull request #7 from digidentity/add_extensions_element_to_request-abstract-type

Add extensions element to request abstract type