* Modified NymConfig trait to make id optional
* Basic validator-api config definition
* Optionally using the config during startup + flag to enable monitoring
* Rocket main stub
* Add anyhow
* Stub cache reads and writes
* Finalize stubs
* Add generic Rocket.toml
* Put back targets
* Have cache own its validator client
* allow dead code
* Update rocket.toml for 0.5