v1.5.8 - Launch fixes

This fixes a network launch issue where rewards for Uncle blocks were incorrectly specified.

Fixes an issue where some clients were unable to sync.

$ shasum -a 256 *
0614f87cd4dcb2fde99c1df6defc7186002e0ac6d0dbf3cc713701ae7c356bbe  gubiq-darwin-amd64
f16abcf27e0863182076aa5a561273e88e75a39e1b8d76ad2faaf9520509e453  gubiq-linux-amd64
803b378ce3493006557732b66a1cfb84ad212795dddb0e4f72f2b151b1e843ce  gubiq-windows-4.0-amd64.exe