* cryptarchia/relative-stake: failing test showing lack of inference
* implement stake-relativization spec
* test total stake inference in empty epoch
* move TestNode to test_common
* fix bug in Follower re-org logic
* improve orphan proof test coverage
* force orphans to already have been in one of the existing branches
* rename initial_inferred_total_stake ==> initial_total_stake
* add simple orphan import test
* Follower.unimported_orphans: ensure no orphans from same branch
* remove unnecessary LedgerState.slot
* cryptarchia: doc fixes
* factor out total stake inference
* docs for total stake inference
* rename total_stake to total_active_stake
* replace prints in cryptarchia with logging.logger
* feat(cryptarchia/epoch-schedule): switch to 334 schedule (from 433)
* factor out common test config building code
* feat(cryptarchia): test_leader uses common test config object
* cryptarchia: update test_ledger_state_is_properly_updated_on_reorg
* cryptarchia: update test_epoch_transition test
* move to .tip() in tests instead of tip_id()
* cryptarchia: wrap long comments
* cryptarchia: move mk_block to test_common
* cryptarchia: move mk_genesis_state to test_common
* cryptarchia: refactor fork test to use mk_chain
* cryptarchia: fork choice rules tests use mk_chain helper
* cryptarchia: rename fork choice test suite to TestForkChoice
* cryptarchia: config.s is always 3k/f or 3*base_period_length
* cryptarchia: hardcode epoch schedule in specification
* un-hard code epoch sched. params + provide a v0.0.1 spec for params
* Add epoch transition to spec
* add tests
* Add block to fork after validation
* Add configs for steps inside an epoch
* rename get_last_valid_state to state_at_slot_beginning
davidrusu
Youngjoon Lee
Giacomo Pasini
David Rusu