Integrates android-switch-backport and http://android-holo-colors.com/ generated assets using #84bf70

Note we use both the ICS style switches in v14 and the Jelly Bean style switches in v16 so as to conform to user expectations. We do not take advantage of the backporting part of android-switch-backport, but only the theming capabilities provided by org.jraf.android.backport.switchwidget.SwitchPreference