fixing logic typo
switching to use new upload method outside of the script instead of inside.  This does not yet include metapackages, since they follow a different code path inside the single_deb package.  This is a step toward avoiding #121
svn checkouts are no longer required
cleaning up staging_dir so as not to get old packages on subsequent runs
Merge pull request #123 from ros-infrastructure/new_dry_upload

New dry upload for the binaries, with misc patches