Release notes:

Stability improvements

fixed a couple issues where stellar-core would perform a lot of redundant bucket merges when publishing to history
specifying fullkeys=true to commands such as quorum now has a consistent behavior, in that when not specified aliases or short keys are returned and when specified only full keys are returned
fixes an issue where in some rare cases transactions for certain accounts would be rejected due to the banning/invalidation of the first transaction in a sequence of transactions for the same account
fixed an issue that was causing command line catchup to panic in some cases
make transitive quorum checking recomputation more deterministic

core now computes a new quorum intersection criticality which allows to detect potential future quorum intersection problems
added new metrics to track performance of various subsystems
ability to replay history with modified bucket list logic (testing)