Level/level — pull request #15 by mscdex (2014-12-04 21:21:11+00:00)
Title: bump leveldown dependency to 1.0.0

leveldown pre-1.0.0 seems to [have](http://stackoverflow.com/questions/27303442/node-js-strange-behaviour-perhaps-module-memory-limit-on-os-x) [issues](https://github.com/ethereum/node-ethereum/issues/6) on OS X.