DocSprint specific tracking is deployed

Hello everybody,

Just to advise that I just finished the initial deployment of some tracking improvement.

Although the Goal tracking URL generator [0] is useful, it is not needed for this docsprint.

Tracking feature wise; all is set!

Namely:
* Any page within the docs subdomain that has a pk_campaign that contains 'DocSprint'  will flag the visitor as a member of the docsprint
* Anybody logged in to MediaWiki has his username sent to Piwik
* A user who click on any button under 'Edit' is logged, we will know if the Contributor clicked on Edit, or something else.

The site is now ready to differentiate normal contributors to the ones present to an event (e.g. by giving away a specific short URL).

Now, we only need to test  D-:



To use during the event:
The short URL is ready.  

During the event, share the URL   http://wpd.mx/amsterdam   And it will go to the URL shown in commit [2]



To test:
We can use a bogus URL, and not create too many. 

Let's test using:  [1]  e.g. ?pk_campaign=DocSprint-201310-Bogus

And we should get usage stats in Piwik.



Important:
Anybody who follows a link with pk_campaign=DocSprintBooyhah (trigger is the part 'DocSprint' in pk_campaign) will be considered as present at the docsprint


What we track:
1. - JavaScript detects that in a GET parameter match pk_campaign=DocSprint, creates a specific cookie for the visitor
2. - If MediaWiki has a user logged in, Piwik receives the username
3. - If a visitor (regardless of wether he is logged in to MW or not)  click on of the buttons under Edit, it gets tracked


  [0]: http://lists.w3.org/Archives/Public/public-wpd-analytics/2013OctDec/0007.html
  [1]: http://docs.webplatform.org/wiki/community/amsterdam_oct_2013?pk_campaign=DocSprint-201310-Bogus
  [2]: https://github.com/webplatform/Shortlinks/commit/546faf257c388bc446a7d486d1cd05377f8d5c2c

Renoir 
~