Wikidata deployment

Rationale
See Wikidata for more information about the Wikidata project generally.

Blockers

 * Tracking bug for phase I deployment:

Core changes
Wikidata patches awaiting review:


 * Gerrit 14295 - Adding sites handling
 * Currently awaiting comment from Jeroen and/or Tim.
 * - Merging the Wikidata branch (ContentHandler)
 * Currently awaiting review by Tim

New extensions
The whole Wikibase code (4 extensions: repo, client and shared code in lib and diff) needs a review
 * Repo
 * Lib
 * Client
 * Diff

Also, we want to deploy Extension:Stick to That Language, see We are currently investigating to replace Stick to That Language with the Universal Language Selector.

Miscellaneous

 * Wikidata/2005 proposal - original 2005 proposal for Wikidata