Followup bug 580870 to rename gTabDeck/gTabFrame to gTabView*.

Bug 580937 - Use plain xul:tabs instead of wrapping with BrowserTab Don't expose BrowserTab and have Tabs give sugarless xul:tabs that don't need .raw-ing. Remove most of the BrowserTab functionality only to leave the event bits.

Rewrote various scaling/easing functions in terms of the Range's, with the new proportion and scale methods. - removed Math.tanh, instead moving it into the Range proportion method for its "smooth" option + rewrote TabItem close button opacity and title font size using the new Range utilities. Should make code a tad easier to follow.

Bug 579223: got snapping to work for tab-on-tab phantom groups.

Bug 579223: using Aza's recommendation, centering tab-on-tab phantom group around the drop target tab (no snapping yet). + fixing font size adjustment while tabitem is resized

Bug 579223: a new approach (on Aza's recommendation): simply take the target (drop target) bounds and expand it a bit, rather than trying to do a union of the areas. Also, fixed font size changing on tab resizing.

Bug 580919 - Fold Storage.saveVisibilityData into saveUIData

Bug 580878: simplifying date expression

Bug 581143: Cleanup geometry utilities in utils.js 1. Move isRect, isPoint, isRange to Utils, to facilitate JSMing and to clean up namespace 2. Remove unused/underutilized methods of Rect/Point/Range 3. Use QuickDraw-style comparison of pixel overlap (using < instead of <=) throughout. 4. Range.overlaps is now Range.contains, to be more consistent with Rect.

Bug 580878: removing some underutilized Utils functions: getMilliseconds, and testLogging

Bug 581078 - Get rid of Utils.activeTab to avoid iterating over all Tabs Directly access gBrowser.selectedTab and compare other raw tabs against it until BrowserTab goes away. Get the reference to the BrowserTab instead of iterating over Tabs through .tabcandyBrowserTab.

Bug 581052 - Don't grab Tabs[0] to get the tabbar for its tabs Just grab gBrowser.tabs to get an array-list of tabs instead of jumping through Tabs[0].raw.parentNode.children hoops.

Bug 580905 - Remove unused Tabs.focused window/tab and BrowserWindow reference Don't save gWindow.tabcandyBrowserWindow but still create the BrowserWindow object for events.

Bug 580901 - Directly call loadOneTab instead of Tabs.open Remove Tabs.open and BrowserWindow.addTab and directly deal with xul tabs.

Bug 580870 - Alias gBrowser to the tabcandy context to remove getCurrentWindow Add aliases for gWindow, gBrowser, gTabDeck, gTabFrame for the tabcandy chrome context. Update uses and simplify some code like removing Navbar.

Bug 580900 - Remove feedback and dev doc links Get rid of _newTab to create tabs from the ui and remove feedback references.

Fixed Bug 566865 - Define all Keyboard Shortcuts for TabCandy

+ Removed the animation from Mirror.hideCachedData() + Removed the tab argument from Mirror.hideCachedData and Mirror.showCachedData, as it's already part of the object + Improve the logic for when to hide the cached data

Resolve merge conflicts.

Merge mozilla-central (4.0b2) to tabcandy-central with conflicts.