Changes:
* Create the ext.popups.lib module, which contains redux@3.6.0 and
redux-thunk@2.1.0.
* Rely on the Resource Loader's minification and mangling (?)
mechanisms.
* Create an asynchronous bootstrap script, which creates a Redux store
when the User Agent is idle.
Change-Id: Ib7168217a5673bb2a8378eb30d6aa45043c66e62
