[alreq] Drafting "Characters in Use"

shervinafshar has just created a new issue for 
https://github.com/w3c/alreq:

== Drafting "Characters in Use" ==
@mostafah started a draft for "Characters in Use" topic keyword. The 
initial draft can be found in 
[here](https://docs.google.com/document/d/1uPrxdtedlodiabT4SjptfVqumeHJCe8Pkl8eWXFiFJc/edit?ts=56389689#).

We're going to discuss the draft here and add the content to the 
Google Doc.

See https://github.com/w3c/alreq/issues/8