..instead of binary, to work around an issue with bitcore/sjcl. I'm not sure
what the issue is exactly, except that encryption of binary data isn't working
correctly due to some kind of string stuff involving decodeURIComponent inside
sjcl. I haven't fully figured it out. For now I am changing the network
protocol to hex to workaround the issue.
See this: https://github.com/bitpay/bitcore/pull/416
...network protocol is backwards incompatible with previous network protocl.
also includes a second version number for backwards-compatible changes (the
original version number was for backwards-incompatible changes).