experiments look more like regular experiments. Batch mode experiments
can now be preloaded and swapped. When preloaded, they go into a
"Pause" state. Swapping a batch mode experiment in puts them into the
"posted" state so the batch daemon will see them. Swapping out a
batchmode experiment does the expected; it puts them back into the
Pause state. Terminating a batch mode experiment does the expected;
its gone. When a batch mode experiment finishes normally, it goes back
into the pause state, which allows batches to be reinjected as many
times as Eric likes.