Tool for users to relay to eth their own lock txs

[oscarguindzberg]

option 1

• new tool in dogethereum-tool relays the tx. Use the service described bellow.
• Write an app that receives a doge tx id by json/rpc and replies with all the information the contract expect when relaying a tx.
• The service can be based on dogethereum-agents. Write a class that exposes a json/rpc interface that provides users with the information they need to be sent to the contract. Add another configuration variable to decide whether the service is enabled or not.
• The service should read registered operators from the contract and add those addresses to its bitcoinj watched addresses list, so the bitcoinj SPV client notifies the dogecoin node it should send txs included for those txs when sending filtered blocks.

option 2:
js tool that creates a superblockchain (connected to a doge node) and creates all the info the contract expects. This is a loooootttttt of work compared to option 1.