ACTION-1672: Mark aria-grabbed, aria-dropeffect as deprecated and provide reference definition of derprecated

Assigned to Joanie. The group agreed that these should be deprecated. We just need wording that these attributes are deprecated and that alternative will be sought in later version of ARIA that takes into account HTML drag and drop functionality.

Michael to come up with a version of this:

This property is planned for deprecation, with a replacement, in a future version of WAI-ARIA.

Joanie, also coordinate text with Joseph for the Core mapping specification.

Joanie to come up with a proposal.

From IRC log during today's meeting:

19:35:18 <janina> bg: Weren't we going to replace somehow?
19:35:24 <janina> rs: Expecting proposal from jd
19:35:57 <janina> jd: I don't see my action as written currently. Do we need to update?
19:36:21 <janina> mk: Think mc is listed because mc had some specific wording to suggest
19:36:28 <clown> "This property is planned for deprecation, with a replacement, in a future version of WAI-ARIA. "
19:36:41 <janina> mk: We want to say "Don't use this anymore, we plan to replace it."
19:37:12 <janina> rs: So deprecate -- we plan to replace it

Branch with draft text:
* https://rawgit.com/w3c/aria/action-1672/aria/aria.html#aria-dropeffect
* https://rawgit.com/w3c/aria/action-1672/aria/aria.html#aria-grabbed
* https://rawgit.com/w3c/aria/action-1672/aria/aria.html#dfn-deprecated

Request for review sent to list:
* https://lists.w3.org/Archives/Public/public-aria/2016Jan/0160.html

Setting State to "pending review."

From today's meeting:

<richardschwerdtfeger> RESOLUTION: Accept Joanie’s changes regarding the deprecation notes on aria-grabbed and aria-dropeffect with the exception that it refer to a future version of WAI-ARIA and not specifically 2.0

Committed to master: https://github.com/w3c/aria/commit/214e03d9bd

Setting State to CLOSED.