OCN Client renamed to OCN Node

The OCN Client project has been renamed to OCN Node, based on community feedback. This rename was done to avoid any confusion over existing client-server architectures.

Changelist from rename:

• New registry contract address on public test environment

  • 0x0A5f27Ee1EbDC68034aDbd9446F9375783aeF7DC

• registry methods renamed:

  • updateClientInfo => updateNodeInfo

  • clientAddressOf=> nodeAddressOf

  • clientURLOf=> nodeURLOf

• /ocn/registry/client-info endpoint renamed to /ocn/registry/node-info