message: add links to sub directories
diff: This repository contains the code for the [Hyperledger Carbon Accounting and Neutrality Working Group](https://wiki.hyperledger.org/display/CASIG/Carbon+Accounting+and+Certification+Working+Group). Each
  sub-folder is for a different project of the Working Group and has its own code and instructions:
  -- utility-emissions-channel: [Utility Emissions Channel](https://wiki.hyperledger.org/display/CASIG/Utility+Emissions+Channel)
  -- net-emissions-token-network: [Net Emissions Token Network](https://wiki.hyperledger.org/display/CASIG/Net+Emissions+Tokens+Network)
  +- [utility-emissions-channel](utility-emissions-channel/README.md): [Utility Emissions Channel](https://wiki.hyperledger.org/display/CASIG/Utility+Emissions+Channel)
  +- [net-emissions-token-network](net-emissions-token-network/README.md): [Net Emissions Token Network](https://wiki.hyperledger.org/display/CASIG/Net+Emissions+Tokens+Network)
  ## Git Notes
  