TabView Release Notes

*** version 2.8.0 ***
* Removing event listeners when a Tab is removed
* Fixed CSS overflow issue

*** version 2.7.0 ***
* null "activeTab" when all tabs are removed
* allow cancelling of tab change from "beforeActiveTabChange"
* changed yui-hidden implementation to hide offscreen instead of display:none
* allow for "activeIndex" in constructor
* fixed setters for "contentEl" and "labelEl"
* added selectTab and deselectTab methods
* fire "remove" event when a tab is removed

*** version 2.6.0 ***
* moved from inline style to "yui-hidden" class for hidden tabs
* activeIndex and activeTab sync issue fixed
* activeIndex change events mapped to activeTab (and vice-versa)

*** version 2.5.2 ***
* no change

*** version 2.5.1 ***
* no change

*** version 2.5.0 ***
* moved Tab default "title" attribute to static Tab.TITLE 

*** version 2.4.0 ***
* no change

*** version 2.3.1 ***
* removed Xoutline from tabview-core.css

** version 2.3.0 ***
* no longer firing tabChange if already selected
* multiple clicks no longer trigger extra xhr if in progress
* now using existing href for Tab href attribute
* CLASSNAME now added if not present on tabview element

*** version 2.2.2 ***

* no change


*** version 2.2.1 ***
* no change

*** version 2.2.0 ***
* Element broken out into seperate pkg
  NOTE: new dependency required - element-beta.js

*** version 0.12.2 ***
* var Tab is now private
* fixed Element.configureAttribute

*** version 0.12.1 ***
* tabs.css renamed to tabview.css
* calls to "set" now queued so they can be made before "contentReady"


*** version 0.12.0 ***
* TabView widget introduced
* Note: border_tabs.css included as basic skin to enable "tabs" look
