Create Base league for Teragrid core

[vuhung]

Create Base league for Teragrid core

Investigate

• Blockchain service/folder in current code
• P2P network in current code

ref. https://github.com/teragrid/teragrid/tree/master/blockchain

Implement

• Update current code to build Base league
• Perform unit tests

DoD

• Unit test done
• Document follows Tendermint conventions. ref. https://github.com/tendermint/tendermint/tree/master/docs

Docs

• Documents in code
• Update https://github.com/teragrid/teragrid/tree/master/docs