AUI-1173 Manual backport for single page application utility
AUI-1206 Manual backport for cancellable promises
AUI-1173 Manual backport for single page application demos
AUI-1215 Manual backport for adding preserve option to parse content to not extract scripts from fragments
AUI-1173 Manual backport to sync aui-surface with master.

Prefetch (AUI-1670)
Popstate AUI-1419
Source formatting
AUI-1173 AUI-1206 Yogi loader regenerate