Move npm-cache-filename to top level dep
addRemoteTarball: Pass data, not name/ver
addLocalTarball: Use pkgData instead of name/version
addLocal: Pass pkgData instead of name
addRemoteTarball: swap args to match addLocalTarball
addPlacedTarball: send package data obj, not name
addLocalTarball: Remove extraneous unpack
getCacheStat: Prevent unnecessary stats with inflight
addLocalTarball: comment cleanup
remove unused variables & packages
addLocalTarball: minor fixups from review with @domenic