Database misses should return undefined.
Database misses should return undefined.

bitfloor/bitcoinjs-server,bankonme/bitcoinjs-server,zhangweis/node-jds,dazoe/bitcoinjs-server,javascriptit/bitcoinjs-server,zhangweis/node-jds,bitfloor/bitcoinjs-server,javascriptit/bitcoinjs-server,bankonme/bitcoinjs-server,bankonme/bitcoinjs-server,javascriptit/bitcoinjs-server,dazoe/bitcoinjs-server,zhangweis/node-jds,dazoe/bitcoinjs-server