are permissions inside manysketch zip files correct?

[ctb]

check to see if sourmash-bio/sourmash_plugin_directsketch#48 and sourmash-bio/sourmash_plugin_directsketch#53 apply here.

[ctb]

seems not to be a problem - not sure why @bluegenes but I guess directsketch did things differently!

...
% ls -la signatures 
total 656
drwxr-xr-x  12 t  staff    384 Jun 14 08:11 .
drwxr-xr-x  16 t  staff    512 Jun 14 08:11 ..
-rw-r--r--   1 t  staff  35047 Jan  1  1980 324074c7287ed934af4fd0a6a459aa30.sig.gz
-rw-r--r--   1 t  staff  10883 Jan  1  1980 418ed0fabef65d7a83ae98b90947672a.sig.gz
-rw-r--r--   1 t  staff  51708 Jan  1  1980 56ceec3045e833db30db8ad16969ff16.sig.gz
-rw-r--r--   1 t  staff  23602 Jan  1  1980 8951157d23d89e5767ac5c7752d251d7.sig.gz
...