[UWS] Add the UWS protocol version as attributes of the nodes <uws>, <jobs> and

<job>.

This commit also:

    - set the version of the UWS protocol to 1.1 (cf UWS.VERSION)
	- add a static constant for the standardID (cf UWS.STANDARD_ID)
	- add a xlink:type and xlink:href for jobListRef in the uws XML
	- set the @version Javadoc attribute of all modified classes to 4.3
	  (scheduled version of the UWSLibrary supporting UWS-1.1)