v0.3.0-rc1

What's new? (since 0.2.0)

• Peer-to-peer network encryption with Noise (#84)
• Networking stack refactor including various bug fixes (#84, #82, #81)
• Use a slightly customised version of Lua that deals with non-determinism bugs in contract execution (#85)

Thanks to @lhorgan for their contributions to this release!

Be sure to back up your wallet before upgrading.