(cherry picked from commit 1dc0e116)

And factored out code in ServerFilesGenerator.php

Small static file server proxy, with compression, caching.
 Used to server piwik.js and the merged+minified CSS and JS files

we shouldnt disable cookies when deleting cookies, these are two different things.

cheers Peter for finding this bad bug!

The new deleteCookies function can be used, whenever new_visit=1 is used, to ensure the cookies are re-created for the new visitor.

For example use as:
_paq.push(["deleteCookies"]);
_paq.push(["appendToTrackingUrl", "new_visit=1"]);

put both at the same time. Make sure you remove the "deleteCookies" otherwise. This should fix it!

I have updated the faq at http://piwik.org/faq/how-to/#faq_187

Updated doc at: http://piwik.org/docs/tracking-api/reference/
 and http://piwik.org/docs/page-speed/

 * by default, send performance.timing.responseEnd - performance.timing.requestStart as generation time with the tracking request
 * if the performance.timing API is not supported by the browser, don't send the metric
 * new method disablePerformanceTracking()
 * new method setGenerationTimeMs(generationTime) to set the generation after measuring it on the server side 

update JSON implementation from 2012-10-08 version of json2.js; applied D.C.'s changes thru-out, including the defense against window.prototype (which I think refers to var declarations shadowing window.prototype)

 * when the referrer is matched to determine whether the session should be started, don't match the domain. this caused trouble for some users and doesn't provide real advantages.
 * new method tracker.setApiUrl() that can be used if the tracker url and the api url (which is used in overlay) differ

Updating the LICENSE.txt and license notice to link to piwik.org page at: http://piwik.org/free-software/bsd/
Anthon I moved your name to the page on the site.

the page on opensource.org was not ideal and explaining well the situation.

Fixes #3818: you can now call piwikTracker.appendToTrackingUrl('lat=X&long=Y');
_and_ disable auth in your config.ini.php
 https://github.com/piwik/piwik/blob/master/config/global.ini.php#L411

+ Adding test

 * the tests/js is now passing following Benaka's commit, sweeet
 * Adding setsiteId to the "special case" so that setSiteId can be called after trackpageView and it still works
 * Adding pathname in the generated JS
 * HTML entity the & in the IMG src

Refs #1845, switch to async JS in other places and apply fixes to tracking code admin page & other pages.

Notes:
  * Fix bug in Installation page that displays JS where newlines were not displayed and text would not be selected on click.
  * Modify piwik.js to make sure setTrackerUrl is called before _paq is processed.
  * Move _paq modifications in tracker code to global scope outside every anonymous function.
  * Fix bug in rewritten site selector widget where selecting the same site didn't fire an event (necessary for some uses).
  * Fix bug where change of site resulted in delay before site name in labels changed.
  * Fix bug where site name was double encoded in tracking code admin page.
  * Rewrite piwik_tag.tpl to use async tracking code.

revert 2 yr broken "feature" - we do not want to set the secure flag in tracker cookies for http/https compatibility