[Members] s/JEP/XEP/g

[Ian Paterson]

> I think it may be time to change our protocol branding to XMPP.

+1

> what about leaving JEPs as they are (so we can continue to handle any 
> organisational stuff) and moving only final and draft proposals over to 
> XEPs

IMHO "Draft" and "Final" already do a good job of differentiating the status 
of JEPs. Different names for protocol extension documents would confuse 
people. (I don't want to have to explain to everyone why there are two 
names.)

- Ian