* Use typeof(console) to prevent IE 7 error

When using directly console !== undefined, older IE versions
throw an error as they're actually tring to access an undefined
value. Use globally supported typeof(console) !== 'undefined'.

Changed typeof(<var>) to typeof <var> as it's not a function

Thanks @sgiehl

* Change other occurences of console !== undefined

* JSLint: Remove console available global as it is not in IE7 and other older browsers

* Minified piwik.js

* JSlint validation

* Minified files after merging 3.x-dev

* Fix regression

* api tweaks

* added tests

* added docs and minified piwik

* fix tests

* improve single page website tracking

* added docs and minified piwik

* Re-generate piwik.js

piwik.js: In addTracker do not explicitely allow to set piwikUrl to null since it may not work (#11381)

New "Enable cross domain linking" checkbox in Javascript Tracker Code generator (Advanced section) (#11295)

* enable set domains when enable cross domains

* fix disable cross domain when only one site url or less

* New "Enable cross domain linking" checkbox in Javascript Tracker Code generator (Advanced section)

* Integration test

* API has new parameter

Cross Domain: forward pk_vid parameter when the clicked element is not directly a link but is within the link <a> element itself (#11262)

* some work on tracking cross domain

* fix some bugs

* fix some edge cases

* fixed tests and added more new tests

* we also need a device specific id to avoid when time is not correct on a different computer etc

* more tests

* minified piwikjs

* use only one parameter and validate values

* fix tests

* improve code

* Re-generated piwik.js

* UI Test

* Comments

* fixes #2321 when tracking request is > 2000 char, prefer POST

* Fix jslint

* refs #11023 better piwik.js json compatibility

* fix some tests

* fix json lint tests

* expose JSON property for Piwik custom trackers

* added test

Piwik JavaScript tracker: we now track by default Downloads and Outlinks when user clicks on the mouse right button or the mouse middle button 

* track a unique id for each pageview

* fix tests

* reduce idpageview to 6 bytes

* added changelog entry

refs #6106

piwik.js: Prepend a slash to all paths such as when users don't specify leading slash for URL path (#10302)