Update rake tasks: create zip- and tar-balls
Update rake tasks: create zip- and tar-balls

Change-Id: Iab2450ea5949a4035500dad9c8a562e2457772b5
Reviewed-on: http://review.couchbase.org/9471
Tested-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>
Reviewed-by: Jan Lehnardt <14e793d896ddc8ca6911747228e86464cf420065@apache.org>
Reviewed-by: Matt Ingenthron <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@couchbase.com>

dewolfe/couchbase-ruby-client,dewolfe/couchbase-ruby-client