Added template method for NoEndpointFoundException

Introduced handleNoEndpointFoundException to allow for customization in
subclasses.

Issue: SWS-850
Removed Token signing section

Removes section that mentions the special "Token" keyword in binary
signature signing, since that feature is no longer supported as of WSS4J
1.6

Issue: SWS-842
Added test for XSD attributes

Added additional tests for inlining XSD attributes.

Issue: SWS-861