Rename <definitions> to <description>

Since WSDL is the Web Services Description Language, it is natural to make 
its root element <description>.  A WSDL document describes a Web service. 
The document is therefore a description. 

This change would make our names more consistent with XSD, i.e it is XML 
Schema language its root element is <schema>. 

The Definitions component should be called the Description component.

Arthur Ryman,
Rational Desktop Tools Development

phone: +1-905-413-3077, TL 969-3077
assistant: +1-905-413-2411, TL 969-2411
fax: +1-905-413-4920, TL 969-4920
mobile: +1-416-939-5063
intranet: http://labweb.torolab.ibm.com/DRY6/