[all] Call for consensus on Entity

Hi all,
(cc-ing additional people who may be interested in this),

this may be relevant at today's call. Here's a summary and integration 
of what was going on around the named entity and disambiguation data 
categories, along with usage in RDFa Lite.

-- Tadej

Related in https://www.w3.org/International/multilingualweb/lt/track/ :
[ISSUE-2]
[ISSUE-18]
[ISSUE-29]
[ISSUE-35]
[ACTION-164]