Don't try to send the .meta directories when using *s

[jdoliner]

curl localhost/file/*

yields

--54c0e46d0daa62501c32dcb1192fab024dced5c79694e6fc636e65dbc6b4
Content-Disposition: form-data; name=".meta"; filename=".meta"
Content-Type: application/octet-stream

read /var/lib/pfs/vol/data-0-3/master/.meta: is a directory

--54c0e46d0daa62501c32dcb1192fab024dced5c79694e6fc636e65dbc6b4--
--aacee4ccb8343ee523f6756c9682f72a7921929a985e0c1e860fa976532d
Content-Disposition: form-data; name=".meta"; filename=".meta"
Content-Type: application/octet-stream

read /var/lib/pfs/vol/data-1-3/master/.meta: is a directory

--aacee4ccb8343ee523f6756c9682f72a7921929a985e0c1e860fa976532d--
--b00326203901e2f2349f8d6c7e945c342c85f4957327a9b8bbf418662099
Content-Disposition: form-data; name=".meta"; filename=".meta"
Content-Type: application/octet-stream

read /var/lib/pfs/vol/data-2-3/master/.meta: is a directory

--b00326203901e2f2349f8d6c7e945c342c85f4957327a9b8bbf418662099--

Should be a pretty quick fix.

[jdoliner]

Fixed by #95.