major refactor

also removed cleaning module, since dfhack no longer corrupts xml
exports; should work in starter pack up to DF 40_09
take dependencies out of data folder

I think it was causing problems.  Also avoided a bug in the CD section
by using relative path instead of pre-expanded %cd%
fix comment syntax, use relative paths

moving from :: to rem avoids some potential errors, using true relative
paths instead of faking it with %CD% is better for copy operations and
cleaner code
more rel paths, for /L loop to move files around

listing files and iterating through the list is much more elegant than
having six identical lines
enable delayed expansion

pretty sure this is the only variable that needs it
fix order of variable assignment
script tested and working, removed cruft

code has less explicit error-handling but is much easier to maintain and
test.  Removed GIMP section until I get it working again - better to
have the rest working than the whole broken.
updated README