Enable symmetric encryption dependencies.
Enable symmetric encryption dependencies.

These are needed by the client and will soon be needed by ripple.js for message
encryption/decryption.

darkdarkdragon/ripple-lib,wilsonianb/ripple-lib,darkdarkdragon/ripple-lib,ripple/ripple-lib,ripple/ripple-lib,darkdarkdragon/ripple-lib,ripple/ripple-lib,wilsonianb/ripple-lib,wilsonianb/ripple-lib,ripple/ripple-lib