[Openid-specs-fapi] Issue #640: Fix the structure of the attacker model document (openid/fapi)

[Nat]

New issue 640: Fix the structure of the attacker model document
https://bitbucket.org/openid/fapi/issues/640/fix-the-structure-of-the-attacker-model

Nat Sakimura:

Align with ISO Directives. 

e.g., New structure: 

Forward  
Introduction  
Warning  
Notational conventions  
1\. Scope  
2\. Normative references  
3\. Terms and definitions  
4\. Symbols and abbreviations  
5\. Security goals  
6\. Attacker models  
7\. Attackers  
8\. Limitations  
A.1 Acknowledgement  
A.2 Bibliography  
A.3 Changes

of which A.3 is to be removed after the FINAL vote.

Responsible: Edmund Jay