* Add validators stream
* Ignore unknown keys rather than error on them
* Reduce accesses to common structures
* Ensure correct information returned for deposited validators
* Short-term cache for remote deposit data
* Name epoch duration for clarity
* Break out duplicated logic in to a single function
* Add capacities for slices and maps where appropriate
* Break out functions; add tests
* Allow stream errors not related to context
Co-authored-by: Nishant Das <nish1993@hotmail.com>
Co-authored-by: Raul Jordan <raul@prysmaticlabs.com>
