* Use vote signer service in fullnode
* Use native types for signature and pubkey, and address other review comments
* Start local vote signer if a remote service address is not provided
* Rebased to master
* Fixes after rebase
* Initial vote signing service implementation
- Does not use enclave for secure signing
* fix clippy errors
* added some tests
* more tests
* Address review comments + more tests
* Vote signing JSON RPC service
- barebone service that listens for RPC requests
* Daemon for vote signer service
* Add request APIs for JSON RPC
* Cleanup of cargo dependencies
* Fix compiler error