Sort out the "stable" portion of the ui-grid.info site when we release 3.0

The unstable version of the tutorial is working, not the stable one, which is kind of ironic.

The Stable/Unstable selector doesn't load the javascript correctly. If you select Stable, you are always loading the unstable javascript, so all the examples with a change from the unstable to stable version doesn't run correctly, like the footer.

Here is the errors :

Error: [$injector:unpr] Unknown provider: uiGridConstantsProvider <- uiGridConstants
http://errors.angularjs.org/1.2.26/$injector/unpr?p0=uiGridConstantsProvider%20%3C-%20uiGridConstants
    at VALIDITY_STATE_PROPERTY (angular.js:78)
    at angular.js:3802
    at Object.getService [as get] (angular.js:3930)
    at angular.js:3807
    at getService (angular.js:3930)
    at invoke (angular.js:3957)
    at Object.instantiate (angular.js:3977)
    at $get (angular.js:7281)
    at angular.js:6670
    at forEach (angular.js:332)

The homepage is broken too (5/7/2015)