1) changed all 4 space indentation to 2 space style indents for replication code...

1) changed all 4 space indentation to 2 space style indents for replication code, 2) fixed broken index test that was broken after pulling from trunk, 3) updated some docs and better internal docs for replication test, 4) added a couple of new tests to make sure replication does not explode if you are careless about transactions inside of transactions inside of execute_reliably, etc.