non-chain binaries

[doggystylez]

Some chains require validators to run other processes in addition to the main tendermint/cosmos consensus/app process, for example Umee with their price-feeder or Gravity with their orchestrator. source code for these these are usually included in the same repo as the chain binary. It would be useful to have either a bool to indicate that such processes exist/are required for the chain to function, or an array of required binaries maybe