Servlet should save Data (EML) to user's ~/.jalama directory
Servlet needs changing so that when it saves data (when user hits "next" and
"finish"), it does so to the user's ~/.jalama directory, instead of to the
servlet context, as is currently the case. Note that the proposed deployment
server (see bug #2017) will ultimately need to sync these data files with those
on the server machine, so maybe it would be a good idea to mirror the directory
structure proposed in bug #2021, comment #1, to make this simpler?