Top-level domain tracking: Force JavaScript tracking code to show in 'header' and disable JavaScript scope setting.

* _anonymizeIp
* before and after code snippets
* 3 different domain modes

As per documentation at http://code.google.com/intl/en/apis/analytics/docs/gaJS/gaJSApiDomainDirectory.html#_gat.GA_Tracker_._link - '_link' already does the document.location internally.

* Changed some documentation

* 'access administration pages' is required to access 'admin' pages
* Form error text in UA validation had a typo.
* Added some helpful inline documentation.
* Switched to drupalLogout()
* Added a new 403 test on 'admin' pages

Delay the outbound click by a fraction of a second. See http://www.google.com/support/analytics/bin/answer.py?answer=55527

Vertical tab has not always shown the correct status of page visibility settings in vertical tab summary().

* Minor code style fixes

* #1021878: Undefined function token_element_validate().