Latest yui3 dev-3.x changes.
Add the parent app as a bubble target for the nested apps.
Host the top level application off a non-default root path which revealed that the spike wasn't working as intended. Had to introduce a second 'root' attribute for building up PJAX urls in the nested Y.Apps as we set the real 'root' attribute in the nested Y.App to not contain the top level app's root (in non-HTML5 browsers).
Latest yui3 dev-3.x changes.
Build files from the last few commits.