* Rewrite of README for clarity and expanding implementation table
* Small cleanups for web3_api.go
* Changed GetReceipts function to non-export (getRecipts) and cleaned up comments
* Added a comment for GetLogsByHash
* Add support for eth_protocolVersion and eth_chainId
* Adding comments and re-ordering fields to agree with Parity's ordering
* Added support for eth_listening. Moved net_version to same file as others
* Setup for adding eth_gasPrice
* Removed old TODOs
* Adding support for web3_clientVersion and web3_sha3
* Fixing formatting
* Adding new endpoints to README
* Responding to comments by removing date from compile-time values
