v1.5.7 Mainnet

This is the first Mainnet Release of Gubiq. :)

$ shasum -a 256 *
80ca26d0676508abc82a58c62116b6199276a483fcb8c95394ea56d50ebc0213  gubiq-darwin-amd64
ff3f67705f45f8a3bdf7a80e985665c71c3865b9f0918e6ffae7bbb16a55daf1  gubiq-linux-amd64
54b84596e09140464f72f1f5cf295c46b61a69ae33015cab55d1d5f8ba4fc616  gubiq-windows-4.0-amd64.exe