NEW ISSUE: WS-Addressing Endpoint redefined in WSRM

Title: WS-Addressing Endpoint redefined in WSRM

Description:
Section 2.1 defines the term 'Endpoint'. This is the same definition 
used by WS-Addressing [1] in section 1. Instead of defining this term 
again in WSRM, just point to the ws-addr document.

Justification:
In the spirit of composability and defining something once and reusing 
it, it makes sense to just refer to the WS-Addressing definition. This 
also protects us from minor changes in definition in the ws-addr spec 
(which is not final yet).

Target: core

Type: editorial

Proposal:
Replace the current definition by a reference to the WS-Addr spec.

Related issues: none

[1] http://www.w3.org/TR/2005/CR-ws-addr-core-20050817/