RPC lib status tracker

[andreabadesso]

To be fully compliant with the RPC protocol defined here, these are the issues pending:

• Return the genesisHash in the htr_getConnectedNetwork RPC method response #8
• Implement the full_path parameter for the htr_getAddress RPC #7
• Validate parameters on RPC requests #10
• Implement the htr_createToken RPC method #11
• Implement the htr_pushTxHex RPC #12
• Implement the htr_sendTx RPC #13
• Implement the htr_getOperationStatus RPC #14