Enyo 2266: Fixed TabBar for integration into Ares

Fixed some issues required to solve Ares's ENYO-2266. This concerns only TabBar. Debug logs were removed except in TabPanels. This is still a work-in-progress.

Tested on:
* Debian Linux with FF 17 and Chromium 17
* Windows 7 with IE8 to 10
* Mac with Safari and FF 22

* ENYO-2266: removed debug logs from TabBar files
* ENYO-2266: recompiled css
* ENYO-2266: added isEmpty method
* ENYO-2266: fix onTabRemoveRequested event data
* ENYO-2266: Fire a onTabChanged event when raising a tab after a tab removal
* ENYO-2266: tweak TabBar styling for Ares. No impact on Onyx

Enyo-DCO-1.1-Signed-off-by: Dominique Dumont <dominique.dumont@hp.com>