Some time optimizations of the PSUL code. 

### Fetch processes per artifacts outside loop

The line:

    processes = lims.get_processes(inputartifactlimsid = inart)

in the method `add_out_art_process_conection_list` will be called a lot of times, and since all processes that involves a certain project can be fetched with a single api call, I decided to move this outside of all the looping.

### Use name_to_id statusdb view instead of id_to_name

The view in Couch DB was incorrectly constructed, so that the PSUL code looped through all rows of the view each time it needed to find a single element. I reversed the view, making it possible to query a single key.

### Compatibility

I did a brute merge of the upstream master, but I have not checked the code and its functionality since then. 
If processes_per_artifact is actually None, doesn't it break ?