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Bump ant version
Generate the (uber)?jar before the tar file

Because the jar task is now an implicit clean, so if we create the tar
file first, it'll just get immediately nuked by the jar task -- oops!
Switch order of arguments

add-file and add-directory seem like they're primarily operations on the
tar itself.
s/dir-name/path/g
Fix the lib directory in the tar

it was showing up with no permissions or username or anything, which was
strange. the fix is a bit of a hack, since there isn't an actual lib
directory to model our entry off of.
Allow a custom leading-path inside the tar
def the cwd and home directories