Reorder pair suggestions based on usage, analogous to commit 1a44e94844d6948d103e31c6121dcb71d5b65ef1.
added node server script
persist second issuer for usd/usd like pairs. Fixes #151
find XRP among the currencies instead of assuming it will be the first
Use Underscore for generic function instead of loop
Trade tab cleanup.
Update upstream. (Order book fixes.)