Revert "Implemented missing functionalities: datastore persistency, polymer repeat tempting and the close button"

This reverts commit 1db2a1906b1bd905dfbf5b397f0f64551ec15c8d.
back to basics on this branch
cleanup
Merge branch 'master' of https://github.com/mgorner/endpoints-polymer-material-tutorial

Conflicts:
	war/WEB-INF/appengine-web.xml
	war/polymer_tutorial_start.html
Merge branch 'master' into complete