* oracle price multiplier (#174)

* oracle price multiplier

* changing added price weight to be i64

* rename added price weight

* Allow risk authority to change rate limiter config in the lending market (#167)

* account for risk authority in set lending market owner and config

* PR fixes

* only let risk authority disable outflows

* Optional, extra oracle on reserve (#176)

* minor refactoring of price fields in reserve

* adding extra oracle pubkey and extra market price to reserve

* using extra market price everywhere

* https://www.youtube.com/watch?v=uLHqpjW3aDs

* validate extra_oracle_pubkey in init reserve / update reserve

* writing tests

* more tests

* more refresh reserve checks

* adding some unit tests for extra_oracle stuff

* test init reserve

* clippy

* pr fixes

* don't care about staleness or variance for the extra oracle

* Collateralization Limits Final (#177)

* forgot to update smoothed price with price scale in switchboard case

* remove redundant multiply

* remove clock (#179)