Myriadcoin 0.18.1.0

Myriadcoin 0.18.1.0 - Major new version

New in this release:

• Updated to Bitcoin 0.18 code base
• Many bug fixes and enhancements
• Improved multi-wallet support
• RISC-V support
• 0.00000001 XMY defined as octibit or obi

note: Not a required update, 0.16 and 0.14 releases are still supported:

• latest 0.16 release: https://github.com/myriadteam/myriadcoin/releases/tag/v0.16.4.1
• latest 0.14 release: https://github.com/myriadteam/myriadcoin/releases/tag/v0.14.5.1