change checkdata and checkparams: try to detect existing info, write only if necessary
incorporate Jeff Laake's intro document as an alternate vignette (get comments on vignette) -- subdivide into quickstart (or quickstart for R users/quickstart for ADMB users/details)?
older
make sure strategy for copying modifying TPL files is robust: should work reliably even for mixed-case input file names, and should always survive a crash well. e.g. rather than moving the original tpl file out of the way, use the _gen file, then move _gen results when finished.
clean up argument list
make sure strategy for guessing/specifying mode of data (esp. numeric/integer) is robust