Bug 930967 - Add broadcasting for sessionstore data r=yoric,billm,smacleod

From 2f772870c7cfb39a4a30c30f1ea75b026385b06c Mon Sep 17 00:00:00 2001
Bug 930967 - Add tests for broadcasting sessionstore data r=yoric,billm,smacleod

From 31c74a1bd1244404b5a98348b1b4ca4e3698afce Mon Sep 17 00:00:00 2001
Bug 867097 - Remove superfluous __SS_tabStillLoading property r=yoric

From 97efb5c74073c21963adb86513f2d1254bd7b844 Mon Sep 17 00:00:00 2001