Enyo 2266: added Tab navigation into Ares

Tested on:
* Linux:  chromium 26, FF17
* Windows 7: IE9 IE10
* Mac: Safari 6

Known issues:
* closing last tab does not reset/blank ACE editor 

* ENYO-2266: Merge remote-tracking branch 'origin/master' into ENYO-2266
* ENYO-2266: removed ares-grabber class
* ENYO-2266: DocumentToolbar is no longer a ToolBar kind
* ENYO-2266: removed ares-bottom-bar class
* ENYO-2266: Merge branch 'ENYO-2616' into ENYO-2266
* ENYO-2266: updated onyx for latest TabBar
* ENYO-2266: show TabBar only when a file is opened
* ENYO-2266: removed css class with no effect
* ENYO-2266: ask Phobos before closing a tab
* ENYO-2266: throw an exception instead of an alert in debud mode
* ENYO-2266: create file tab *after* file cache entry is created
* ENYO-2266: renamed onClose event to onCloseFileRequest
* ENYO-2266: removed zombie code
* ENYO-2266: removed unneeded FittableColumn
* ENYO-2266: removed unused classes
* ENYO-2266: Removed dead AresTab kind with ares-tab classes
* ENYO-2266: switch to project view on close from Phobos only if TabBar is empty
* ENYO-2266: trace unknow file id
* ENYO-2266: relay close from Phobos to TabBar
* ENYO-2266: renamed showFiles->showProjectView, likewise for hideFiles
* ENYO-2266: fire doToggleOpen only when tapping the grabber
* ENYO-2266: Fixes file switch
* ENYO-2266: use onyx  master
* ENYO-2266: replaced dynamic buttons with TabBar from Onyx
* ENYO-2266: removed dead code related to old buttons in bottom bar
* ENYO-2266: load onyx's wip-package.js
* ENYO-2266: update onyx with TabBar
* ENYO-2266: reformat

Enyo-DCO-1.1-Signed-off-by: Dominique Dumont <dominique.dumont@hp.com>